W7100A Datasheet v1.2.5 2
Table of Contents
1 Overview ....................................................................................... 11
1.1 Introduction ................................................................................... 11
1.2 W7100A Features ............................................................................. 11
1.3 W7100A Block Diagram & Features ........................................................ 12
1.3.1 ALU (Arithmetic Logic Unit) ........................................................ 12
1.3.2 TCPIPCore ............................................................................. 14
1.4 Pin Description ................................................................................ 16
1.4.1 Pin Layout ............................................................................. 16
1.4.2 Pin Description ........................................................................ 17
1.4.2.1 Configuration .................................................................... 18
1.4.2.2 Timer ............................................................................. 19
1.4.2.3 UART .............................................................................. 19
1.4.2.4 DoCD™ Compatible Debugger ................................................ 19
1.4.2.5 Interrupt / Clock ............................................................... 19
1.4.2.6 GPIO .............................................................................. 20
1.4.2.7 Media Interface ................................................................. 21
1.4.2.8 Network Indicator LED ......................................................... 22
1.4.2.9 Power Supply Signal ............................................................ 22
1.5 64pin package description .................................................................. 24
1.5.1 Difference between 100 and 64pin package .................................... 24
2 Memory ........................................................................................ 26
2.1 Code Memory ................................................................................. 27
2.1.1 Code Memory Wait States ........................................................... 29
2.2 Data Memory .................................................................................. 29
2.2.1 Data Memory Wait States ........................................................... 30
2.3 External Data Memory Access .............................................................. 30
2.3.1 Standard 8051 Interface ............................................................ 30
2.3.2 Direct Interface....................................................................... 32
2.4 Internal Data Memory and SFR ............................................................. 33
2.5 SFR definition ................................................................................. 34
2.5.1 Program Code Memory Write Enable Bit ......................................... 34
2.5.2 Program Code Memory Wait States Register ..................................... 34
2.5.3 Data Pointer Extended Registers .................................................. 36
2.5.4 Data Pointer Registers ............................................................... 36
2.5.5 Clock Control Register ............................................................... 37
W7100A Datasheet v1.2.5 3
2.5.6 Internal Memory Wait States Register ............................................ 38
2.5.7 Address Latch Enable Register ..................................................... 39
2.5.8 External Memory Wait States Register ............................................ 39
2.5.9 Stack Pointer .......................................................................... 40
2.5.10 New & Extended SFR ................................................................ 40
2.5.11 Peripheral Registers .................................................................. 42
3 Interrupt ....................................................................................... 44
4 I/O Ports ....................................................................................... 48
5 Timers .......................................................................................... 52
5.1 Timers 0, 1 .................................................................................... 52
5.1.1 Overview ............................................................................... 52
5.1.2 Interrupts .............................................................................. 53
5.1.3 Timer0 – Mode0 ....................................................................... 54
5.1.4 Timer0 – Mode1 ....................................................................... 55
5.1.5 Timer0 – Mode2 ....................................................................... 55
5.1.6 Timer0 – Mode3 ....................................................................... 56
5.1.7 Timer1 – Mode0 ....................................................................... 57
5.1.8 Timer1 – Mode1 ....................................................................... 57
5.1.9 Timer1 – Mode2 ....................................................................... 58
5.1.10 Timer1 – Mode3 ....................................................................... 58
5.2 Timer2.......................................................................................... 59
5.2.1 Overview ............................................................................... 59
5.2.2 Interrupts .............................................................................. 60
6 UART ............................................................................................ 63
6.1 Interrupts ...................................................................................... 64
6.2 Mode0, Synchronous ......................................................................... 65
6.3 Mode1, 8-Bit UART, Variable Baud Rate, Timer 1 or 2 Clock Source ................ 66
6.4 Mode2, 9-Bit UART, Fixed Baud Rate ..................................................... 66
6.5 Mode3, 9-Bit UART, Variable Baud Rate, Timer1 or 2 Clock Source ................. 67
6.6 Examples of Baud Rate Setting ............................................................ 67
7 Watchdog Timer .............................................................................. 68
7.1 Overview ....................................................................................... 68
7.2 Interrupts ...................................................................................... 68
7.3 Watchdog Timer Reset ...................................................................... 69
7.4 Simple Timer .................................................................................. 70
7.5 System Monitor ............................................................................... 70
7.6 Watchdog Related Registers ................................................................ 70
7.7 Watchdog Control ............................................................................ 71
W7100A Datasheet v1.2.5 4
7.7.1 Clock Control .......................................................................... 72
7.8 Timed Access Registers ...................................................................... 72
8 TCPIPCore ..................................................................................... 73
8.1 Memory Map ................................................................................... 73
8.2 Registers list .................................................................................. 73
8.2.1 Common Registers.................................................................... 73
8.2.2 SOCKET Registers ..................................................................... 75
8.3 Register Description ......................................................................... 86
8.3.1 Mode Register ......................................................................... 86
8.3.2 SOCKET Registers ..................................................................... 92
9 Functional Description ..................................................................... 110
9.1 Initialization ................................................................................. 110
9.2 Data Communication ....................................................................... 115
9.2.1 TCP .................................................................................... 115
9.2.1.1 TCP SERVER ..................................................................... 116
9.2.1.2 TCP CLIENT ..................................................................... 123
9.2.2 UDP .................................................................................... 124
9.2.2.1 Unicast & Broadcast .......................................................... 124
9.2.2.2 Multicast ........................................................................ 129
9.2.3 IPRAW .................................................................................. 132
9.2.4 MACRAW ............................................................................... 134
10 Electrical Specification .................................................................... 141
10.1 Absolute Maximum Ratings ................................................................ 141
10.2 DC Characteristics .......................................................................... 141
10.3 Power consumption(Driving voltage 3.3V) .............................................. 142
10.4 AC Characteristics .......................................................................... 142
10.5 Crystal Characteristics ..................................................................... 143
10.6 Transformer Characteristics ............................................................... 143
11 IR Reflow Temperature Profile (Lead-Free) ............................................ 144
12 Package Descriptions ....................................................................... 145
12.1 Package type: LQFP 100 ................................................................... 145
12.2 Package type: QFN 64 ...................................................................... 147
13 Appendix:Performance Improvement about W7100A ................................. 149
13.1 Summary ...................................................................................... 149
13.2 8–Bit Arithmetic Functions ................................................................. 149
13.2.1 Addition ............................................................................... 149
13.2.2 Subtraction ........................................................................... 151
13.2.3 Multiplication ........................................................................ 152
W7100A Datasheet v1.2.5 5
13.2.4 Division ................................................................................ 152
13.3 16-Bit Arithmetic Functions ............................................................... 152
13.3.1 Addition ............................................................................... 152
13.3.2 Subtraction ........................................................................... 153
13.3.3 Multiplication ........................................................................ 153
13.4 32-bit Arithmetic Functions ............................................................... 154
13.4.1 Addition ............................................................................... 154
13.4.2 Subtraction ........................................................................... 155
13.4.3 Multiplication ........................................................................ 155
W7100A Datasheet v1.2.5 6
List of Figures
Figure 1.1 W7100A Block Diagram ........................................................................ 12
Figure 1.2 Accumulator A Register ........................................................................ 13
Figure 1.3 B Register ........................................................................................ 13
Figure 1.4 Program Status Word Register ................................................................ 13
Figure 1.5 PSW Register .................................................................................... 13
Figure 1.6 TCPIPCore Block Diagram ..................................................................... 14
Figure 1.7 W7100A Pin Layout ............................................................................. 16
Figure 1.8 W7100A QFN 64 Pin Layout ................................................................... 17
Figure 1.9 Power Design .................................................................................... 24
Figure 2.1 Code / Data Memory Connections ........................................................... 26
(Example ICs : MAX811, MIC811, DS1811) ............................................................... 26
Figure 2.2. Boot Sequence Flowchart .................................................................... 27
Figure 2.3 APP Entry Process ............................................................................... 28
Figure 2.4 Changing the code memory Status at RB = ‘0’ ............................................ 28
Figure 2.5 Data Memory Map .............................................................................. 29
Figure 2.6 Standard 8051 External Pin Access Mode (EM[2:0] = “001”) ............................ 31
Figure 2.7 Standard 8051 External Pin Access Mode (EM[2:0] = “011”) ............................ 31
Figure 2.8 Direct 8051 External Pin Access Mode (EM[2:0] = “101”) ................................ 32
Figure 2.9 Direct 8051 External Pin Access Mode (EM[2:0] = “111”) ................................ 32
Figure 2.10 Internal Memory Map ......................................................................... 33
Figure 2.11 SFR Memory Map .............................................................................. 33
Figure 2.12 PWE bit of PCON Register ................................................................... 34
Figure 2.13 Code memory Wait States Register ........................................................ 34
Figure 2.14 Waveform for code memory Synchronous Read Cycle with Minimal Wait States
(WTST = ‘4’) ................................................................................... 35
Figure 2.15 Waveform for code memory Synchronous Write Cycle with Minimal Wait
States(WTST = ‘4’) ........................................................................... 35
Figure 2.16 Data Pointer Extended Register ............................................................ 36
Figure 2.17 Data Pointer Extended Register ............................................................ 36
Figure 2.18 MOVX @RI Extended Register ............................................................... 36
Figure 2.19 Data Pointer Register DPTR0 ................................................................ 36
Figure 2.20 Data Pointer 1 Register DPTR1 .............................................................. 36
Figure 2.21 Data Pointer Select Register ................................................................ 37
Figure 2.22 Clock Control Register – STRETCH bits .................................................... 37
Figure 2.23 Internal Memory Wait States Register ..................................................... 38
Figure 2.24 Internal Memory Wait States Register ..................................................... 39
W7100A Datasheet v1.2.5 7
Figure 2.25 First Byte of Internal Memory Wait States Register ..................................... 39
Figure 2.26 Second Byte of Internal Memory Wait States Register .................................. 39
Figure 2.27 Stack Pointer Register ........................................................................ 40
Figure 2.28 PHY Status Register ........................................................................... 40
Figure 2.29 Internal PHY Configuration Register ....................................................... 40
Figure 2.30 W7100A Configuration Register ............................................................. 41
Figure 2.31 Core clock count register .................................................................... 42
Figure 2.32 Core clock count register .................................................................... 42
Figure 2.33 Core clock count register .................................................................... 42
Figure 2.34 Core clock count register .................................................................... 42
Figure 3.1 Interrupt Enable Register ..................................................................... 45
Figure 3.2 Interrupt Priority Register .................................................................... 45
Figure 3.3 Timer0, 1 Configuration Register ............................................................ 45
Figure 3.4 UART Configuration Register ................................................................. 46
Figure 3.5 Extended Interrupt Enable Register ......................................................... 46
Figure 3.6 Extended Interrupt Priority Register ........................................................ 46
Figure 3.7 Extended Interrupt Flag Register ............................................................ 47
Figure 3.8 Watchdog Control Register .................................................................... 47
Figure 4.1 Port0 Pull-down register ...................................................................... 48
Figure 4.2 Port0 Register ................................................................................... 48
Figure 4.3 Port1 Register ................................................................................... 48
Figure 4.4 Port2 Register ................................................................................... 49
Figure 4.5 Port3 Register ................................................................................... 49
Figure 4.6 Port0 Pull-down register ...................................................................... 50
Figure 4.7 Port1 Pull-down register ...................................................................... 50
Figure 4.8 Port2 Pull-down register ...................................................................... 50
Figure 4.9 Port3 Pull-down register ...................................................................... 50
Figure 4.10 Port0 Pull-up register ........................................................................ 50
Figure 4.11 Port1 Pull-up register ........................................................................ 51
Figure 4.12 Port2 Pull-up register ........................................................................ 51
Figure 4.13 Port3 Pull-up register ........................................................................ 51
Figure 5.1 Timer0, 1 Control Mode Register ............................................................ 53
Figure 5.2 Timer0, 1 Configuration Register ............................................................ 53
Figure 5.3 Interrupt Enable Register ..................................................................... 53
Figure 5.4 Interrupt Priority Register .................................................................... 54
Figure 5.5 Timer0, 1 Configuration Register ............................................................ 54
Figure 5.6 Timer Counter0, Mode0: 13-Bit Timer/Counter ........................................... 55
Figure 5.7 Timer/Counter0, Mode1: 16-Bit Timer/Counter .......................................... 55
W7100A Datasheet v1.2.5 8
Figure 5.8 Timer/Counter0, Mode2: 8-Bit Timer/Counter with Auto-Reload...................... 56
Figure 5.9 Timer/Counter0, Mode3: Two 8-Bit Timers/Counters .................................... 56
Figure 5.10 Timer/Counter1, Mode0: 13-Bit Timer/Counter ......................................... 57
Figure 5.11 Timer/Counter1, Mode1: 16-Bit Timers/Counters ...................................... 57
Figure 5.12 Timer/Counter1, Mode2: 8-Bit Timer/Counter with Auto-Reload .................... 58
Figure 5.13 Timer2 Configuration Register .............................................................. 59
Figure 5.14 Timer/Counter2, 16-Bit Timer/Counter with Auto-Reload ............................ 60
Figure 5.15 Interrupt Enable Register — Timer2 ....................................................... 60
Figure 5.16 Interrupt Priority Register — Timer2 ....................................................... 61
Figure 5.17 Timer2 Configuration Register — TF2 ...................................................... 61
Figure 5.18 Timer/Counter2, 16-Bit Timer/Counter with Capture Mode .......................... 61
Figure 5.19 Timer2 for Baud Rate Generator Mode .................................................... 62
Figure 6.1 UART Buffer Register ........................................................................... 63
Figure 6.2 UART Configuration Register ................................................................. 63
Figure 6.3 UART Bits in Power Configuration Register ................................................ 64
Figure 6.4 UART Bits in Interrupt Enable Register ..................................................... 65
Figure 6.5 UART Bits in Interrupt Priority Register ..................................................... 65
Figure 6.6 UART Configuration Register ................................................................. 65
Figure 6.7 Timing Diagram for UART Transmission Mode0 (clk = 88.4736 MHz) ................... 66
Figure 6.8 Timing Diagram for UART Transmission Mode1 ............................................ 66
Figure 6.9 Timing Diagram for UART Transmission Mode2 ............................................ 66
Figure 6.10 Timing Diagram for UART Transmission Mode3 ........................................... 67
Figure 7.1 Watchdog Timer Structure .................................................................... 68
Figure 7.2 Interrupt Enable Register ..................................................................... 68
Figure 7.3 Extended Interrupt Enable Register ......................................................... 68
Figure 7.4 Extended interrupt Priority Register ........................................................ 69
Figure 7.5 Watchdog Control Register .................................................................... 69
Figure 7.6 Watchdog Control Register .................................................................... 71
Figure 7.7 Clock Control register – Watchdog bits ..................................................... 72
Figure 8.1 TCPIPCore Memory Map ....................................................................... 73
Figure 8.2 SOCKET n Status transition .................................................................. 100
Figure 8.3 Calculate Physical Address ................................................................... 107
Figure 9.1 Allocation Internal TX/RX memory of SOCKET n ......................................... 114
Figure 9.2 TCP SERVER & TCP CLIENT ................................................................... 115
Figure 9.3 “TCP SERVER” Operation Flow .............................................................. 116
Figure 9.4 “TCP CLIENT” Operation Flow .............................................................. 123
Figure 9.5 UDP Operation Flow ........................................................................... 124
Figure 9.6 The received UDP data format .............................................................. 126
W7100A Datasheet v1.2.5 9
Figure 9.7 IPRAW Operation Flow ........................................................................ 133
Figure 9.8 The received IPRAW data format ........................................................... 134
Figure 9.9 MACRAW Operation Flow ..................................................................... 135
Figure 9.10 The received MACRAW data format ....................................................... 136
W7100A Datasheet v1.2.5 10
List of Tables
Table 2.1 External memory access mode ................................................................ 30
Table 2.2 WTST Register Values ........................................................................... 34
Table 2.3 DPTR0, DPTR1 Operations ...................................................................... 37
Table 2.4 MD[2:0] Bit Values ............................................................................... 38
Table 2.5 Ram WTST Bit Values ............................................................................ 38
Table 2.6 TCPIPCore / Flash WTST Bit Values ........................................................... 39
Table 3.1 External Interrupt Pin Description ............................................................ 44
Table 3.2 W7100A Interrupt Summary .................................................................... 44
Table 4.1 I/O Ports Pin Description ....................................................................... 48
Table 4.2 Read-Modify-Write Instructions ............................................................... 49
Table 5.1 Timers 0, 1 Pin Description .................................................................... 52
Table 5.2 Timers 0, 1 Mode ................................................................................ 52
Table 5.3 Timer0, 1 interrupts ............................................................................. 54
Table 5.4 Timer2 Pin Description .......................................................................... 59
Table 5.5 Timer2 Modes ..................................................................................... 59
Table 5.6 Timer2 Interrupt ................................................................................. 62
Table 6.1 UART Pin Description ............................................................................ 63
Table 6.2 UART Modes ....................................................................................... 64
Table 6.3 UART Baud Rates ................................................................................. 64
Table 6.4 UART Interrupt ................................................................................... 65
Table 6.5 Examples of Baud Rate Setting ................................................................ 67
Table 7.1 Watchdog Interrupt.............................................................................. 69
Table 7.2 Summary for Watchdog Related Bits ......................................................... 70
Table 7.3 Watchdog Bits and Actions ..................................................................... 71
Table 7.4 Watchdog Intervals .............................................................................. 72
Table 7.5 Timed Access Registers ......................................................................... 72
Table 9.1 Timer / Counter Mode ......................................................................... 111
Table 9.2 Baud rate ......................................................................................... 111
Table 9.3 Mode of UART ................................................................................... 111
W7100A Datasheet v1.2.5 11
1 Overview
1.1 Introduction
iMCU W7100A is the one-chip solution which integrates an 8051 compatible microcontroller,
64KB SRAM and hardwired TCP/IP Core for high performance and easy development.
The TCP/IP core is a market-proven hardwired TCP/IP stack with an integrated Ethernet
MAC & PHY. The Hardwired TCP/IP stack supports the TCP, UDP, IPv4, ICMP, ARP, IGMP and
PPPoE which has been used in various applications for years.
1.2 W7100A Features
• Fully software compatible with industrial standard 8051
• Pipelined architecture which enables execution of instructions 4~5 times faster than a standard
8051
• 10BaseT/100BaseTX Ethernet PHY embedded
• Power down mode supported for saving power consumption
• Hardwired TCP/IP Protocols: TCP, UDP, ICMP, IPv4 ARP, IGMP, PPPoE, Ethernet
• Auto Negotiation (Full-duplex and half duplex), Auto MDI/MDIX
• ADSL connection with PPPoE Protocol with PAP/CHAP Authentication mode support
• 8 independent sockets which are running simultaneously
• 32Kbytes Data buffer for the Network
• Network status LED outputs (TX, RX, Full/Half duplex, Collision, Link, and Speed)
• Not supports IP fragmentation
• 2 Data Pointers (DPTRs) for fast memory blocks processing
• Advanced INC & DEC modes
• Auto-switch of current DPTR
• 64KBytes Data Memory (RAM)
• 255Bytes data FLASH, 64KBytes Code Memory, 2KBytes Boot Code Memory
• Up to 16M bytes of external (off-chip) data memory
• Interrupt controller
• 2 priority levels
• 4 external interrupt sources
• 1 Watchdog interrupt
• Four 8-bit I/O Ports
• Three timers/counters
• Full-duplex UART
• Programmable Watchdog Timer
• DoCD™ compatible debugger
• High Product Endurance
• Minimum 100,000 program/erase cycles
• Minimum 10 years data retention
W7100A Datasheet v1.2.5 12
1.3 W7100A Block Diagram & Features
Figure 1.1 W7100A Block Diagram
The W7100A internal block diagram is shown in the Figure 1.1. Details of block functions are
described as follows:
ALU – Performs arithmetic and logic operations during execution of an instruction. It
contains accumulator (ACC), Program Status Word (PSW), B registers, and related logics such
as arithmetic unit, logic unit, multiplier, and divider.
SFR – Controls the access of special registers. It contains standard and user defined registers
and related logic. User defined external devices can be quickly accessed (read, write,
modified) using all direct addressing mode instructions.
1.3.1 ALU (Arithmetic Logic Unit)
W7100A is fully compatible with the standard 8051 microcontroller, and maintains all
instruction mnemonics and binary compatibility. W7100A incorporates many great
architectural enhancements which enable the W7100A MCU to execute instructions with high
speed.
The ALU of W7100A MCU performs extensive data manipulation and is comprised of the 8-bit
arithmetic logic unit (ALU), an ACC (0xE0) register, a B (0xF0) register and a PSW (0xD0)
register
W7100A Datasheet v1.2.5 13
ACC (0xE0)
7
6
5
4
3
2
1
0
Reset
ACC.7
ACC.6
ACC.5
ACC.4
ACC.3
ACC.2
ACC.1
ACC.0
0x00
Figure 1.2 Accumulator A Register
The B register is used during multiplication and division operations. In other cases, this
register is used as normal SFR.
B (0xF0)
7
6
5
4
3
2
1
0
Reset
B.7
B.6
B.5
B.4
B.3
B.2
B.1
B.0
0x00
Figure 1.3 B Register
The ALU performs arithmetic operations such as addition, subtraction, multiplication, and
division, and other operations such as increment, decrement, BCD-decimal-add-adjust, and
compare. Logic unit uses AND, OR, Exclusive OR, complement, and rotation to perform
different operations. The Boolean processor performs bit operations such as set, clear,
complement, jump-if-not-set, jump-if-set-and-clear, and move to/from carry.
PSW (0xD0)
7
6
5
4
3
2
1
0
Reset
CY
AC
F0
RS1
RS0
OV
F1
P
0x00
Figure 1.4 Program Status Word Register
CY
Carry flag
AC
Auxiliary carry
F0
General purpose flag 0
RS[1:0]
Register bank select bits
RS[1:0] Function Description
00 -Bank 0, data address 0x00 - 0x07
01 -Bank 1, data address 0x08 - 0x0F
10 -Bank 2, data address 0x10 - 0x17
11 -Bank 3, data address 0x18 - 0x1F
OV
Overflow flag
F1
General purpose flag 1
P
Parity flag
Figure 1.5 PSW Register
The PSW register contains several bits that can reflect the current state of MCU.
W7100A Datasheet v1.2.5 14
1.3.2 TCPIPCore
Figure 1.6 TCPIPCore Block Diagram
Ethernet PHY
The W7100A includes 10BaseT/100BaseTX Ethernet PHY. It supports half-duplex/full-duplex,
auto-negotiation and auto-MDI/MDIX. It also supports 6 network indicator LED outputs such as
Link, TX, RX status, Collision, speed and duplex.
TCPIP Engine
TCPIP Engine is a hardwired logic based network protocol which contains technology of
WIZnet.
- 802.3 Ethernet MAC(Media Access Control)
This controls Ethernet access of CSMA/CD(Carrier Sense Multiple Access with Collision
Detect). The protocol is based on a 48-bit source/destination MAC address.
- PPPoE(Point-To -Point Protocol over Ethernet)
This protocol uses PPP service over Ethernet. The payload (PPP frame) is encapsulated
inside an Ethernet frame during a transmission. When receiving, it de-capsulates the
PPP frame. PPPoE supports PPP communication with PPPoE server and PAP/CHAP
authentications.
- ARP(Address Resolution Protocol)
ARP is the MAC address resolution protocol by using IP address. This protocol exchanges
ARP-reply and ARP-request from peers to determine the MAC address of each other
W7100A Datasheet v1.2.5 15
- IP (Internet Protocol)
This protocol operates in the IP layer and provides data communication. IP
fragmentation is not supported. It is not possible to receive the fragmented packets. All
protocol number is supported except for TCP or UDP. In case of TCP or UDP, use the
hardwired embedded TCPIP stack.
- ICMP(Internet Control Message Protocol)
ICMP is a protocol which provides information, unreachable destination. When a Ping-
request ICMP packet is received, a Ping-reply ICMP packet is sent.
- IGMPv1/v2(Internet Group Management Protocol version 1/2)
This protocol processes IGMP messages such as the IGMP Join/Leave. The IGMP is only
enabled in UDP multicast mode. Only version 1 and 2 of IGMP logic is supported. When
using a newer version of IGMP, IGMP should be manually implemented in the IP layer.
- UDP(User Datagram Protocol)
It is a protocol which supports data communication at the UDP layer. User datagram
such as unicast, multicast, and broadcast are supported
- TCP(Transmission Control Protocol)
This protocol operates in the TCP layer and provides data communication. Both TCP
server and client modes are supported.
W7100A Datasheet v1.2.5 16
1.4 Pin Description
1.4.1 Pin Layout
Package type: LQFP 100
VCC3V3
P2.7/A15
P2.6/A14
P2.5/A13
P2.4/A12
P2.3/A11
P2.2/A10
P2.1/A9
GND
P2.0/A8
P0.7/AD7
P0.6/AD6
P0.5/AD5
VCC3V3
P0.4/AD4
P0.3/AD3
P0.2/AD2
VCC1V8
P0.1/AD1
P0.0/AD0
1V8O
VCC3V3
PM0
PM1
PM2
GND
VCC1V8
XTLN1
XTLP1
GNDA
VCC1A8
GNDA
XTLP0
XTLN0
VCC1A8
RESETBG
VCC3A3
TM3
TM2
TM1
TM0
BOOTEN
GND
GND
nRST
T0
T1
GATE0
GATE1
T2
T2EX
RXD
VCC1V8
TXD
DCDCLK
DCDDI
DCDDO
P1.0/A0
P1.1/A1
P1.2/A2
P1.3/A3
P1.4/A4
P1.5/A5
P1.6/A6
P1.7/A7
P3.0/A16
P3.1/A17
GND
P3.2/A18
VCC3V3
P3.3/A19
P3.4/A20
P3.5/A21
P3.6/A22
P3.7/A23
VCC1V8
SPDLED
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
60
59
58
57
56
55
54
53
52
51
41
42
43
44
45
46
47
48
49
50
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
85
84
83
82
81
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
VCC3V3
nINT0
nINT1
nINT2
nINT3
FDXLED
COLLED
RXLED
TXLED
LINKLED
GNDA
RXIP
RXIN
VCC1A8
TXOP
TXON
GNDA
VCC3A3
nRD
nWR
ALE
PLOCK
GNDA
iMCU W7100A
Figure 1.7 W7100A Pin Layout
W7100A Datasheet v1.2.5 17
Package type: QFN 64
Figure 1.8 W7100A QFN 64 Pin Layout
1.4.2 Pin Description
The pin functionalities are described in the following table. There are no tri-state output
pins and internal signals.
Type
Description
I
Input
O
Output with 8mA driving current
IO
Input/Output (Bidirectional)
Pu
Internal pulled-up with 4.7KΩ resistor
Pd
Internal pulled-down with 85KΩ resistor
W7100A Datasheet v1.2.5 18
1.4.2.1 Configuration
Pin name
Pin number
I/O
Pu/Pd
Description
100pin
64pin
nRST
8
9
I
Pu
Global asynchronous reset, Active low
TM3-0
1,2,
3,4
2,3,
4,5
I
Pd
Must be connected to GND; value ‘0000’
PM2 - 0
70,
71,
72
-
I
Pd
PHY Mode
PM
Description
2
1
0
0
0
0
Normal Operation Mode
Auto-negotiation enabled with all
functionalities
0
0
1
Auto-negotiation with 100 BASE-TX
FDX/HDX ability
0
1
0
Auto-negotiation with 10 BASE-T
FDX/HDX ability
0
1
1
Reserved
1
0
0
Manual selection of 100 BASE-TX FDX
1
0
1
Manual selection of 100 BASE-TX HDX
1
1
0
Manual selection of 10 BASE-T FDX
1
1
1
Manual selection of 10 BASE-T HDX
FDX : Full-Duplex, HDX : Half-Duplex
BOOTEN
5
6
I
Pd
Boot Enable/Disable
0 – Enable User Application mode
Jump to 0x0000, the start address of user Code
FLASH.
1- Enable Boot mode
Run boot code in Boot ROM
PLOCK
77
51
O
-
PLL Lock line, It notifies when internal PLL is
locked
W7100A Datasheet v1.2.5 19
1.4.2.2 Timer
Pin name
Pin number
I/O
Pu/Pd
Description
100pin
64pin
Timer0, 1 Interface
T0
9
-
I
Pu
Timer0 external clock input
T1
10
-
I
Pu
Timer1 external clock input
GATE0
11
-
I
Pd
Timer0 gate control
GATE1
12
-
I
Pd
Timer1 gate control
Timer2 Interface
T2
13
-
I
Pu
Timer2 external clock input
T2EX
14
-
I
Pu
Timer2 Capture/Reload trigger
1.4.2.3 UART
Pin name
Pin number
I/O
Pu/Pd
Description
100pin
64pin
RXD
15
10
I
-
Serial receiver
TXD
17
12
O
-
Serial transmitter
1.4.2.4 DoCD™ Compatible Debugger
Pin name
Pin number
I/O
Pu/Pd
Description
100pin
64pin
DCDCLK
18
13
O
-
DoCD clock
DCDDI
19
14
I
Pu
DoCD data input
DCDDO
20
15
O
DoCD data output
1.4.2.5 Interrupt / Clock
Pin name
Pin number
I/O
Pu/Pd
Description
100pin
64pin
nINT0
22
17
I
-
External interrupt0
nINT1
23
-
I
Pu
External interrupt1
nINT2
24
-
I
Pu
External interrupt2
nINT3
25
-
I
Pu
External interrupt3
XTLN0
61
40
O
-
Crystal output for WIZnet Core, A parallel-
resonant 25MHz crystal or ceramic is connected.
If use oscillator, this pin can be floated.
XTLP0
62
41
I
-
Crystal input for WIZnet Core, A parallel-
W7100A Datasheet v1.2.5 20
resonant 25MHz crystal or ceramic is connected.
If use oscillator, this pin connected with 1.8V
output of OSC.
XTLN1
67
45
O
-
Crystal output for MCU core, A parallel-resonant
11.0592MHz crystal or ceramic is connected. If
oscillator is uesd, this pin can be floated.
XTLP1
66
44
I
-
Crystal input for MCU core, A parallel-resonant
11.0592MHz crystal or ceramic is connected. If
oscillator is used, this pin is connected with 1.8V
output of OSC.
1.4.2.6 GPIO
Pin name
Pin number
I/O
Pu/Pd
Description
100pin
64pin
P0.0
81
52
IO
-
Port0 input/output, Ext Memory Data0, Addr0
P0.1
82
53
IO
-
Port0 input/output, Ext Memory Data1, Addr1
P0.2
84
55
IO
-
Port0 input/output, Ext Memory Data2, Addr2
P0.3
85
56
IO
-
Port0 input/output, Ext Memory Data3, Addr3
P0.4
86
57
IO
-
Port0 input/output, Ext Memory Data4, Addr4
P0.5
88
59
IO
-
Port0 input/output, Ext Memory Data5, Addr5
P0.6
89
60
IO
-
Port0 input/output, Ext Memory Data6, Addr6
P0.7
90
61
IO
-
Port0 input/output, Ext Memory Data7, Addr7
P1.0
26
18
IO
-
Port1 input/output, Ext Memory Addr0
P1.1
27
19
IO
-
Port1 input/output, Ext Memory Addr1
P1.2
28
20
IO
-
Port1 input/output, Ext Memory Addr2
P1.3
29
21
IO
-
Port1 input/output, Ext Memory Addr3
P1.4
30
22
IO
-
Port1 input/output, Ext Memory Addr4
P1.5
31
23
IO
-
Port1 input/output, Ext Memory Addr5
P1.6
32
24
IO
-
Port1 input/output, Ext Memory Addr6
P1.7
33
25
IO
-
Port1 input/output, Ext Memory Addr7
P2.0
91
62
IO
-
Port2 input/output, Ext Memory Addr8
P2.1
93
64
IO
-
Port2 input/output, Ext Memory Addr9
P2.2
94
1
IO
-
Port2 input/output, Ext Memory Addr10
P2.3
95
-
IO
-
Port2 input/output, Ext Memory Addr11
P2.4
96
-
IO
-
Port2 input/output, Ext Memory Addr12
P2.5
97
-
IO
-
Port2 input/output, Ext Memory Addr13
P2.6
98
-
IO
-
Port2 input/output, Ext Memory Addr14
W7100A Datasheet v1.2.5 21
P2.7
99
-
IO
-
Port2 input/output, Ext Memory Addr15
P3.0
34
-
IO
-
Port3 input/output, Ext Memory Addr16
P3.1
35
-
IO
-
Port3 input/output, Ext Memory Addr17
P3.2
37
-
IO
-
Port3 input/output, Ext Memory Addr18
P3.3
39
-
IO
-
Port3 input/output, Ext Memory Addr19
P3.4
40
-
IO
-
Port3 input/output, Ext Memory Addr20
P3.5
41
-
IO
-
Port3 input/output, Ext Memory Addr21
P3.6
42
-
IO
-
Port3 input/output, Ext Memory Addr22
P3.7
43
-
IO
-
Port3 input/output, Ext Memory Addr23
Note: User can control the GPIO I/O driving voltage using PxPU/PxPD SFR.
Note: In that case, GPIO0~3 is used to transfer External memory address and data. Please
refer to the ‘2.3 External Data Memory Access’
1.4.2.7 External Memory Interface
Pin name
Num
I/O Type
Description
ALE
78
O
Data memory address bus [7:0] latch enable
nWR
79
OL
External data memory write
nRD
80
OL
External data memory read
Note: When user using External memory by standard 8051 interface, P0[7:0] can transfer
Data[7:0] or Address[7:0] by ALE pin control.
1.4.2.8 Media Interface
Pin name
Pin number
I/O
Pu/Pd
Description
100pin
64pin
TXON
52
32
O
-
TXON/TXOP Signal Pair, The differential data is
transmitted to the media on the TXON/TXOP
signal pair
TXOP
53
33
O
-
RXIN
55
35
I
-
RXIN/RXIP Signal Pair, The differential data from
the media is received on the RXIN/RXIP Signal
pair
RXIP
56
36
I
-
RESETBG
59
38
I
-
PHY Off-chip resistor, Connect a resistor of 12.3
㏀±1% to the ground. Refer to the “Reference
schematic”
For the best performance,
1. Make the length of RXIP / RXIN signal pair (RX) same if possible.
2. Make the length of TXOP / TXON signal pair (TX) same if possible.
3. Locate the RXIP and RXIN signal as near as possible.
W7100A Datasheet v1.2.5 22
4. Locate the TXOP and TXON signal as near as possible.
5. Locate the RX and TX signal pairs far from noisy signals such as bias resistor or
crystal.
6. Keep regular between TX/RX signal pair.
For more details, refer to “W5100 Layout Guide.pdf.”
1.4.2.9 Network Indicator LED
Pin name
Pin number
I/O
Pu/Pd
Description
100pin
64pin
SPDLED
45
27
O
-
Link speed LED
Low: 100Mbps
High: 10Mbps
FDXLED
46
-
O
-
Full duplex LED
Low: Full-duplex
High: Half-duplex
COLLED
47
-
O
-
Collision LED
Low: Collision detected (only half-duplex)
RXLED
48
-
O
-
Receive activity LED
Low: Receive signal detected on RXIP/RXIN
TXLED
49
-
O
-
Transmit activity LED
Low: Transmit signal detected on TXOP/TXON
LINKLED
50
28
O
-
Link LED
Low: Link (10/100M) is detected
1.4.2.10 Power Supply Signal
Pin
name
Pin number
I/O
Pu/
Pd
Description
100pin
64pin
VCC3A3
58, 75
37, 49
Power
-
Analog 3.3V power supply
Be sure to connect a 10uF tantalum capacitor
between VCC3A3 and GNDA in order to prevent
power compensation
VCC3V3
21,
38,
73,
87,
100
16, 58
Power
-
Digital 3.3V power supply
A 0.1uF decoupling capacitor should be connected
between each pair of VCC and GND. A 1uH ferrite
bead should be used to separate the VCC3V3 and
VCC3A3
VCC1A8
54,
34, 42
Power
-
Analog 1.8V power supply
W7100A Datasheet v1.2.5 23
60,
64
A 10uF tantalum capacitor and a 0.1uF capacitor
should be connected between VCC1A8 and GNDA
to filter out core power noise
VCC1V8
16,
44,
68, 83
39,
46,
54, 11
Power
-
Digital 1.8V power supply
Between each pair of VCC and GND, a 0.1uF
decoupling capacitor should be connected
GNDA
51,
57,
63,
65,
76
31,
43, 50
Power
-
Analog ground
Design the analog ground plane as wide as
possible during PCB layout
GND
6, 7,
36,
69, 92
7, 8,
26,
47, 63
Power
-
Digital ground
Design the digital ground plane as wide as
possible during PCB layout
1V8O
74
48
Power
-
1.8V regulated output voltage
1.8V/150mA power generated by internal power
regulator which is used for core operation power
(VCC1A8, VCC1V8).
Between the 1V8O and GND, Be sure to connect a
3.3uF tantalum capacitor for output frequency
compensation and a 0.1uF capacitor for high
frequency noise decoupling.
1V8O is connected to VCC1V8, separated to 1uH
inductor and connected to VCC1A8.
<Notice> 1V8O is the power supply for W7100A use
only. This supply should not be connected with
any other devices.
W7100A Datasheet v1.2.5 24
Figure 1.9 Power Design
1.5 64pin package description
1.5.1 Difference between 100 and 64pin package
Difference
64 pin
100 pin
Deleted pin
T0, T1, GATE0, GATE1, T2, T2EX, nINT1, nINT2,
nINT3, FDXLED, COLLED, RXLED, TXLED, PM2,
PM1, PM0, EXTALE, EXTDATAWR, EXTDATARD,
GPIO3[0:7], GPIO2[3:7]
-
External memory
X
O
PHY mode setting
only use SFR
use SFR or PM pins
GPIO
max 19pin
max 32pin
*Note: In case of 64pin package, the PHY mode is must be set by PHYCONF SFR. So, user must
set the MODE_EN bit to enable the MODE2 ~ 0 bit configuration. Then set the MODE2 ~ 0 value
and reset the PHY controlling the PHY_RSTn bit. After the reset the 64pin package chip will
be successfully initialized and operate properly. When the user uses the 64pin package chip,
the code below must be executed in chip initialize routine.
For more detailed information about the PHYCONF SFR, please refer to the section 2.5.10
‘New & Extended SFR’.
W7100A Datasheet v1.2.5 25
PHYCONF |= 0x08; // MODE_EN bit enable
PHYCONF &= 0xF8; // MODE2 ~ 0 value is 0 (normal mode); Auto configuration mode
PHYCONF |= 0x20; // Set the PHY_RSTn bit (reset bit)
Delay(); // Delay for reset timing (refer to the section 10 ‘Reset Timing’)
PHYCONF &= ~(0x20); // Clear the PHY_RSTn bit
W7100A Datasheet v1.2.5 26
2 Memory
The W7100A’s memory is divided into two types of memories: “Code Memory” and “Data
Memory”. Each memory can use the memory lock function. If the lock is set, internal memory
accessing from outside is denied and also cannot use the W7100A debugger. For more detailed
information about the memory lock function, please refer to the “WizISP Program Guide”.
The memory structure of W7100A is roughly shown figure 2.1.
Figure 2.1 Code / Data Memory Connections
*Note:
We recommend the use of an external Power Supply Low Voltage Detector to prevent system
malfunction during periods of insufficient power supply voltage.
It can be prevented Non-volatile Memory Corruption, SRAM Corruption and CPU Register
Corruption. Please refer to the iMCU7100EVB’s Schematic on WIZnet website.
(Example ICs : MAX811, MIC811, DS1811)
W7100A Datasheet v1.2.5 27
2.1 Code Memory
“Code Memory” consists the Boot ROM from 0x0000 to 0x07FF and Code FLASH from 0x0000
to 0xFFFF. After the system is reset, the W7100A always executes the code of Boot ROM at
“Code Memory.” According to the BOOTEN pin, the code of Boot ROM executes differently.
Figure 2.2 shows the flow of Boot ROM code. After the booting, the system proceeds to either
the ISP process or the APP Entry according to the BOOTEN pin. When ISP process is selected
(BOOTEN = ‘1’), the ISP code of the Boot ROM will run. Otherwise ( BOOTEN = ‘0’), the system
jumps to the APP Entry without running the ISP code of Boot ROM.
ISP code is used for WizISP program when writing user code to code FLASH. And the APP
Entry is used for running user application code. The APP Entry contains the ‘memory map
switching code’ and the jumping code which jumps to the start address 0x0000 of the user
application in Code FLASH memory. The memory map switching is as below.
Figure 2.2. Boot Sequence Flowchart
The initial state of W7100A has both ‘Boot ROM / APP Entry’ and FLASH as shown in Figure
2.3. But since the addresses of ‘Boot ROM / APP Entry’ and FLASH are overlapped, they use
same address at 0x0000 ~ 0x07FF / 0xFFF7 ~ 0xFFFF. The iMCU W7100A respectively maps the
‘Boot ROM / APP Entry’ and FLASH(64K) to the code and data memory.
The user application code can be written to the FLASH(mapped to data memory). But in this
state, the FLASH cannot be used as a code memory because this state is for writing user
application code. To use the FLASH as a code memory, the memory map needs to be switched.
To do this, user should select APP Mode by setting the BOOTEN pin to ‘0’, and then the Boot
ROM code jumps to APP Entry immediately. Next, the APP Entry un-maps the Boot ROM and
maps the Code FLASH to code memory. After switching the code memory map, the APP Entry
W7100A Datasheet v1.2.5 28
Figure 2.3 APP Entry Process
jumps to start address of Code FLASH (0x0000). This flow is shown in Figure 2.3.
If the APP Mode is selected, the Code FLASH 64KB can be used as a code memory. But both
FLASH and APP Entry are still overlapped at the same address. Therefore, to use all FLASH
64KB, the APP Entry must be un-mapped from “Code Memory.” To un-map APP Entry, user
should set RB bit in WCONF(0xFF) to ‘0’ at the user startup code. Then the APP Entry is un-
mapped as shown below.
Figure 2.4 Changing the code memory Status at RB = ‘0’
WCONF (0xFF)
7
6
5
4
3
2
1
0
Reset
RB
ISPEN
EM2
EM1
EM0
Reserved
FB
BE
0x00
W7100A Datasheet v1.2.5 29
When the Code FLASH takes more than 0xFFF7, the below code must be inserted into startup
code. If using this method, the W7100A immediately disables the APP Entry address after its
system reset.
ANL 0FFH, #07FH ; Clear Reboot flag
Set the BOOTEN pin to ‘0’ and clear the RB bit of WCONF register at the startup code. Then
the embedded Code FLASH 64KB memory of the W7100A can be completely used as a code
memory.
2.1.1 Code Memory Wait States
The wait states are managed by internal WTST(0x92) register. The number of wait states is
fixed by the value stored in the WTST register. Please refer to the section 2.5.10 ‘New &
Extended SFR’ for more details.
2.2 Data Memory
The W7100A contains 64KB of embedded RAM, 64KB of TCPIPCore and the 255Byte of the
Data FLASH. The Data FLASH can be used for saving user IP, MAC, subnet mask or port number.
Also the W7100A can address up to 16M bytes of external Data Memory. The figure below
shows the Data Memory map. This memory is accessed by MOVX instructions only. The
external memory can be extended by user.
Figure 2.5 Data Memory Map
W7100A Datasheet v1.2.5 30
2.2.1 Data Memory Wait States
The Data Memory wait states are managed by CKCON(0x8E). The number of wait states is
fixed to the value stored inside CKCON register. Please refer to the section 2.5.10 ‘New &
Extended SFR’ for more detailed information.
2.3 External Data Memory Access
The external address pin and data pin has two access modes. The first mode is to use latch
to address line in standard 8051. And the second method is directly connecting all lines to
address line. Also user can use address pin and data pin as GPIO (General Purpose I/O). Please
refer to the section 10 ‘Electrical specification’ for the speed of external memory accessing.
Table 2.1 External memory access mode
Mode
EM[2:0]
P0
P1
P2
P3
Standard 1
001
Addr[7:0]/Data[7:0]
GPIO
Addr[15:8]
GPIO
Standard 2
011
Addr[7:0]/Data[7:0]
GPIO
Addr[15:8]
Addr[23:16]
Direct 1
101
Data[7:0]
Addr[7:0]
Addr[15:8]
GPIO
Direct 2
111
Data[7:0]
Addr[7:0]
Addr[15:8]
Addr[23:16]
2.3.1 Standard 8051 Interface
This method is same as external interface of general 8051. But the range of accessible
address is changed refer to the setting of EM[2:0] (External Memory Mode) which spaced
WCONF(0xFF) of SFR register. When user sets the EM[2:0] to “001”, the port0 is used as
address/data bus and the port2 is used as upper side address (A[15:8]). The port1 and port3 is
used as GPIO.
Note :
The external memory interface using standard 8051 interface has an erratum where the ALE
signal turns on after the WR/RD signal is enabled; the ALE signal is supposed to turn on before
the WR/RD signal is enabled. To resolve this erratum, OR the WR/RD signal with ALE signal
and connect it to the external memory’s nWR and nOE.
For more details, please refer to document ‘W7100A Errata sheet - Erratum3.’
It is shown the figure below.
W7100A Datasheet v1.2.5 31
W7100A
A[15:0]
AD[7:0]
D[7:0]
Latch
ALE
P0[7:0]
External
Device
P1[7:0]
P2[7:0]
EM[2:0]=001
WCONF
(0xFF)
GPIO
GPIO
A[15:8]
P3[7:0]
nOE
nWE
nWR
nRD
ALE
OR
OR
Figure 2.6 Standard 8051 External Pin Access Mode (EM[2:0] = “001”)
When user sets the EM[2:0] to “011”, as in the previous case, the port0 is used as
address/data bus and the port2 is used as upper side address (A[15:8]). But, since the port3 is
used as topside address (A[23:16]), the range of accessible address is expanded. The
remained port1 is used as GPIO. It is shown the figure below.
W7100A
A[23:0]
AD[7:0]
D[7:0]
Latch
ALE
P0[7:0]
External
Device
P1[7:0]
P2[7:0]
GPIO
A[15:8]
A[23:16]
EM[2:0]=011
WCONF
(0xFF)
P3[7:0]
nOE
nWE
nWR
nRD
ALE
OR
OR
Figure 2.7 Standard 8051 External Pin Access Mode (EM[2:0] = “011”)
In the Standard 8051 External pin access mode, MCU controls the ALE (Address Latch Enable)
signal to classify the address and data signal. User can configure the duration of ALE signal
using the ALECON(0x9F) SFR. For more detailed information about ALECON, please refer to
the section 2.5.10 ‘New & Extended SFR’.
W7100A Datasheet v1.2.5 32
2.3.2 Direct Interface
This method is directly connecting the data line to address line. When user sets the EM[2:0]
to “101”, the port0 is used as data line (D[7:0]) and the port1 is lower side address (A[7:0])
and the port2 is used as upper side address (A[15:8]). The remained port3 can be used as
GPIO. Using this method, user can connect data line to address line without latch. It is shown
the figure 2.8 as below.
W7100A A[7:0]
D[7:0]
P1[7:0]
P0[7:0]
External
Device
P2[7:0]
P3[7:0] GPIO
A[15:8]
A[15:0]
EM[2:0]=101
WCONF
(0xFF)
Figure 2.8 Direct 8051 External Pin Access Mode (EM[2:0] = “101”)
When user sets the EM[2:0] to “111”, the port0, port1 and port2 has same usage in the
previous case and the port3 is used as topside address (A[23:16]). In this method, there is no
port to use GPIO. It is shown the figure below.
A[7:0]
D[7:0]
P1[7:0]
P0[7:0]
External
Device
P2[7:0]
P3[7:0]
A[15:8]
A[23:16]
A[23:0]
EM[2:0]=111
WCONF
(0xFF)
W7100A
Figure 2.9 Direct 8051 External Pin Access Mode (EM[2:0] = “111”)
W7100A Datasheet v1.2.5 33
2.4 Internal Data Memory and SFR
The Figure below shows the Internal Memory and Special Function Registers (SFR) map.
Figure 2.10 Internal Memory Map
The lower internal RAM consists of four register banks with eight registers each, a bit-
addressable segment with 128 bits (16 bytes) that begins at 0x20, and a scratchpad area with
208 bytes is embedded. With indirect addressing mode ranging from 0x80 to 0xFF, the highest
128 bytes is accessed as an internal memory. But with direct addressing mode ranging from
0x80 to 0xFF, this area is accessed as a SFR memory.
Figure 2.11 SFR Memory Map
New SFR – New additional SFR, described in this section
Extended SFR – Extended from standard 8051, described in this section
Standard – standard 8051 SFR, described in this section
All of the SFR in the left hand side column ending with 0 or 8 are bit addressable.
W7100A Datasheet v1.2.5 34
2.5 SFR definition
The following section describes SFR of W7100A and its functions. For more detailed
information about peripheral SFR, please refer to the section 2.5.11 ‘Peripheral SFR’.
2.5.1 Program Code Memory Write Enable Bit
Inside the PCON register, the Program Write Enable (PWE) bit is used to enable/disable
Program Write signal activity during MOVX instructions.
When the PWE bit is set to logic ‘1', the “MOVX @DPTR, A” instruction writes the data from
the accumulator register into the code memory addressed by using the DPTR register (active
DPH:DPL)
The “MOVX @Rx, A” instruction writes the data from the accumulator register into code
memory addressed by using the P2 register (bits 15:8) and Rx register (bits 7:0).
PCON (0x87)
7
6
5
4
3
2
1
0
Reset
SMOD0
-
-
PWE
-
0
0
0
0x00
Figure 2.12 PWE bit of PCON Register
Note: 1. PCON.2 ~ PCON.0 bits are reserved. They must be set to ‘0’
2.5.2 Program Code Memory Wait States Register
Wait states register provides the information for code memory access time.
WTST (0x92)
7
6
5
4
3
2
1
0
Reset
-
-
-
-
-
WTST.2
WTST.1
WTST.0
0x07
Figure 2.13 Code memory Wait States Register
Note: 1. These bits are considered during program fetches and MOVC instructions only.
Since code memory write are performed by MOVX instruction, CKCON
register regulates the CODE-WR pulse width.
2. Read cycle takes minimal 4 clock period and maximal 8 clock periods.
Table 2.2 WTST Register Values
WTST[2:0]
Access Time [clk]
7
8
6
7
5
6
4
5
3
Not Used
2
Not Used
1
Not Used
0
Not Used
W7100A Datasheet v1.2.5 35
During Instruction fetching, code memory can be accessed by MOVC instruction only. The
code memory can be read with minimal 4 wait states. The timing diagrams are shown in the
Figures below.
Figure 2.14 Waveform for code memory Synchronous Read Cycle with Minimal Wait State
s (WTST = ‘4’)
Note: 1. clk – System clock frequency (88.4736 MHz)
2. ADDRESS – Address of the actual modified program byte
3. CODE_RD – Read signal of the code memory
4. CODE – Data write to the actual modified program byte
The code memory can be written by MOVX instruction with minimal 4 wait states. It allows
W7100A core to operate with fast and slow code memory devices. The timing diagrams are
shown in the Figure below.
Figure 2.15 Waveform for code memory Synchronous Write Cycle with Minimal Wait State
s(WTST = ‘4’)
Note: 1. clk – System clock frequency (88.4736 MHz)
2. ADDRESS – Address of the actual modified program byte
3. CODE – Data write to the actual modified program byte
4. CODE_WR – Write signal of the code memory
5. PRG – State of the code memory
W7100A Datasheet v1.2.5 36
2.5.3 Data Pointer Extended Registers
Data Pointer Extended registers, DPX0, DPX1 and MXAX, hold the most significant part of
memory addresses when accessing to data located above 64KB. After reset, DPX0, DPX1, and
MXAX restores to the default value 0x00.
DPX0 (0x93)
7
6
5
4
3
2
1
0
Reset
DPXP.7
DPX.6
DPX.5
DPX.4
DPX.3
DPX.2
DPX.1
DPX.0
0x00
Figure 2.16 Data Pointer Extended Register
DPX1 (0x95)
7
6
5
4
3
2
1
0
Reset
DPX1.7
DPX1.6
DPX1.5
DPX1.4
DPX1.3
DPX1.2
DPX1.1
DPX1.0
0x00
Figure 2.17 Data Pointer Extended Register
MXAX (0xEA)
7
6
5
4
3
2
1
0
Reset
MXAM.7
MXAX.6
MXAX.5
MXAX.4
MXAX.3
MXAX.2
MXAX.1
MXAX.0
0x00
Figure 2.18 MOVX @RI Extended Register
When MOVX instruction uses DPTR0/DPTR1 register, the most significant part of the address
A[23:16] is always equal to the content of DPX0(0x93)/DPX1(0x95). When MOVX instruction
uses R0 or R1 register, the most significant part of the address A[23:16] is always equal to the
content of MXAX(0xEA) while another A[15:8] is always equal to P2(0xA0) contents.
2.5.4 Data Pointer Registers
Dual data pointer registers are implemented to speed up data block copying. DPTR0 and
DPTR1 are located in four SFR addresses. Active DPTR register is selected by SEL bit (0x86.0).
If the SEL bit set to ‘0’, DPTR0 (0x83:0x82) is selected, otherwise DPTR1 (0x85:0x84) is
selected.
DPTR0(0x83:0x82)
DPH0(0x83)
DPL0(0x82)
Reset
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
0x0000
Figure 2.19 Data Pointer Register DPTR0
DPTR1(0x85:0x84)
DPH1(0x85)
DPL1(0x84)
Reset
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
0x0000
Figure 2.20 Data Pointer 1 Register DPTR1
W7100A Datasheet v1.2.5 37
DPS (0x86)
7
6
5
4
3
2
1
0
Reset
ID1
ID0
TSL
-
-
-
-
SEL
0x00
Figure 2.21 Data Pointer Select Register
Note: TSL - Toggle select enable. When TSL is set, this bit toggles the SEL bit by exec
uting the following instructions.
INC DPTR
MOV DPTR, #data16
MOVC A, @A + DPTR
MOVX @DPTR, A
MOVX A, @DPTR
When TSL = 0, DPTR related instructions will not affect the state of the SEL
bit.
Unimplemented bit - Read as 0 or 1.
Table 2.3 DPTR0, DPTR1 Operations
ID1
ID0
SEL = 0
SEL = 1
0
0
INC DPTR
INC DPTR1
0
1
DEC DPTR
INC DPTR1
1
0
INC DPTR
DEC DPTR1
1
1
DEC DPTR
DEC DPTR1
Selected data pointer register is used in the following instructions:
MOVX @DPTR, A
MOVX A, @DPTR
MOVC A, @A + DPTR
JMP @A + DPTR
INC DPTR
MOV DPTR, #data16
2.5.5 Clock Control Register
Clock control register CKCON (0x8E) contains MD [2:0] bits which provide the information for
the dedicated data memory read/write signal pulses width.
CKCON (0x8E)
7
6
5
4
3
2
1
0
Reset
WD1
WD0
-
-
-
MD2
MD1
MD0
0x07
Figure 2.22 Clock Control Register – STRETCH bits
W7100A Datasheet v1.2.5 38
The dedicated data memory read/write signals are activated during MOVX instruction. The
purpose of MD[2:0] is to adjust the communication speed with I/O devices such as slow RAM,
LCD displays, etc. After reset, MD[2:0] will be restored to the default value of 0x07, which
means that slow devices work properly. Users can change the MD[2:0] value to speed up/slow
down the software execution. The value of MD[2:0] can be changed any time during program
execution (e.g. between MOVX and different speed devices).
Table 2.4 MD[2:0] Bit Values
MD[2:0]
Pulse Width[clock]
7
8
…
…
2
3
1
Not Used
0
Not Used
This read/write pulse width must have a minimum of 3 clock cycle and a maximum of 8
clock cycle.
2.5.6 Internal Memory Wait States Register
Internal Memory Wait States Register INTWTST(0x9C) is used for setting the access time of
internal 64KB RAM, TCPIPCore and 255Byte internal flash.
INTWTST (0x9C)
7
6
5
4
3
2
1
0
Reset
Ram WTST
TCPIPCore WTST
Flash WTST
0xFF
Figure 2.23 Internal Memory Wait States Register
- Ram WTST: Set the 64Kbytes RAM access time, has two 2bit value 0 ~ 3.
- TCPIPCore WTST: Set the TCPIPCore access time, has 3bit value 0 ~ 7.
- Flash WTST: Set the internal flash access time, has 3bit value 0 ~ 7.
Internal ram WTST value means below access time in table 2.3.
Table 2.5 Ram WTST Bit Values
WTST
Pulse Width[clock]
3
5
2
4
1
3
0
2
W7100A Datasheet v1.2.5 39
TCPIPCore, Internal flash WTST value means below access time in table 2.4.
Table 2.6 TCPIPCore / Flash WTST Bit Values
WTST
Pulse Width[clock]
7
10
6
9
5
8
4
7
3
6
2
5
1
4
0
3
2.5.7 Address Latch Enable Register
ALECON SFR is used for standard 8051 external pin access mode. The time duration of ALE
(Address Latch Enable) signal can be controlled by ALECON SFR.
If we set the ALECON to 1, ALE signal will be down to ‘0’ after 1 clock. If we set it to ‘n’,
ALE signal maintains 1+n clock and down to ‘0’.
ALE maintain duration = ALECON value + 1 clock
The initial value of ALECON is 0xFF. User can configure this value depending on external
device speed.
ALECON (0x9F)
7
6
5
4
3
2
1
0
Reset
AC.7
AC.6
AC.5
AC.4
AC.3
AC.2
AC.1
AC.0
0xFF
Figure 2.24 Internal Memory Wait States Register
2.5.8 External Memory Wait States Register
EXTWTST SFR is used for configuring the timing of external memory access. Using the 16bit
of this SFR user can control the value from 0 to 65535.
EXTWTST0 (0x9D)
7
6
5
4
3
2
1
0
Reset
EW.7
EW.6
EW.5
EW.4
EW.3
EW.2
EW.1
EW.0
0xFF
Figure 2.25 First Byte of Internal Memory Wait States Register
EXTWTST1 (0x9E)
7
6
5
4
3
2
1
0
Reset
EW.15
EW.14
EW.13
EW.12
EW.11
EW.10
EW.9
EW.8
0xFF
Figure 2.26 Second Byte of Internal Memory Wait States Register
W7100A Datasheet v1.2.5 40
2.5.9 Stack Pointer
The W7100A has an 8-bit stack pointer called SP(0x81) and is located in the internal RAM
space.
SP (0x81)
7
6
5
4
3
2
1
0
Reset
SP.7
SP.6
SP.5
SP.4
SP.3
SP.2
SP.1
SP.0
0x07
Figure 2.27 Stack Pointer Register
This pointer is incremented before data is stored in PUSH and CALL executions, and
decremented after data is popped in POP, RET, and RETI executions. In other words, the Stack
pointers always points to the last valid stack byte.
2.5.10 New & Extended SFR
PHY_IND(0xEF): PHY indicator register, shows the current state of internal PHY in W7100A.
PHY_IND (0xEF)
7
6
5
4
3
2
1
0
Reset
FDX
SPD
LINK
0x00
Figure 2.28 PHY Status Register
Note: FDX : 0 – Full duplex / 1 – Half duplex
SPD : 0 – 100Mbps / 1 – 10Mbps
LINK : 0 – The link is down / 1 – The link is up
ISPID(0xF1) : ID Register for ISP.
ISPADDR16(0xF2) : 16bit Address Register for ISP
ISPDATA(0xF4) : Data Register for ISP.
CKCBK(0xF5) : CKCON Backup Register.
DPX0BK(0xF6) : DPX0 Backup Register.
DPX1BK(0xF7) : DPX1 Backup Register.
DPSBK(0xF9) : DPX Backup Register.
RAMBA16(0xFA) : RAM Base Address Register.
RAMEA16(0xFC) : RAM End Address Register.
PHYCONF (0xFE): W7100A PHY operation mode, reset, power down configuration register
PHYCONF (0xFE)
7
6
5
4
3
2
1
0
Reset
-
-
PHY_RSTn
PHY_PWDN
MODE_EN
MODE2
MODE1
MODE0
0x00
Figure 2.29 Internal PHY Configuration Register
W7100A Datasheet v1.2.5 41
Note: PHY_RSTn: Reset the Internal PHY of W7100A, if user want to reset the PHY usi
ng this bit, set this bit ‘1’ first, then manually clear to ‘0’ after the
reset time. About the reset time please refer to the section 10 ‘Elec
trical Specification’.
PHY_PWDN: 1- Power down mode: turn off the embedded Ethernet PHY to save
power consumption
0 – Normal operation mode.
MODE_EN : 1 – Configure W7100A operation mode using the MODE2 ~ 0 bit / 0 – d
on’t use MODE2 ~ 0 bit. In the QFN 64pin package, must use this bit
and MODE2 ~ 0 bits to configure the operation mode of W7100A
MODE2 ~ 0: Please refer to the section 1.4.2 ‘Pin Description’ PM2 ~ 0 pin settin
g value, MODE2 ~ 0 bit are same as PM2 ~ 0 pin.
- : Reserved, must be set to ‘0’
ex> usage of mode selection using MODE2 ~ 0
PHYCONF |= 0x08; // MODE_EN bit enable
PHYCONF &= 0xF8; // MODE2 ~ 0 value is 0 (normal mode); Auto configuration mode
PHYCONF |= 0x20; // Set the PHY_RSTn bit (reset bit)
Delay(); // Delay for reset timing(refer to the section 10 ‘Electrical Specification’)
PHYCONF &= ~(0x20); // Clear the PHY_RSTn bit
WCONF(0xFF): W7100A configuration register
WCONF (0xFF)
7
6
5
4
3
2
1
0
Reset
RB
ISPEN
EM2
EM1
EM0
Reserved
FB
BE
0x00
Figure 2.30 W7100A Configuration Register
Note:
RB : 0 – No Reboot / 1 – Reboot after the ISP done (APP Entry(0xFFF7 ~ 0xFFFF)
RD/WR Enable)
ISPEN : 0 – Enable ISP in Boot built in W7100A / 1 – Disable
EM[2:0] : External memory mode, please refer to the section 2.3 ‘External Data
Memory Access’.
FB : FLASH Busy Flag for ISP. Read only.
BE : Boot Enable (1 – Boot Running / 0 – Apps Running). Read only.
W7100A Datasheet v1.2.5 42
CLKCNT0(0xDC): W7100A core clock count register bit0 ~ 7.
CLK_CNT0 (0xDC)
7
6
5
4
3
2
1
0
Reset
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0x00
Figure 2.31 Core clock count register
Note: CLK_CNT is 32bit SFR, reset value is 0, increase its value at every core clock. T
his SFR is used for counting core clock or measuring time or clock.
ex> 1 second = about 88000000 clock count (core clock is about 88MHz)
CLKCNT0(0xDD): W7100A core clock count register bit8 ~ 15.
CLK_CNT1 (0xDD)
7
6
5
4
3
2
1
0
Reset
Bit15
Bit14
Bit13
Bit12
Bit11
Bit10
Bit9
Bit8
0x00
Figure 2.32 Core clock count register
CLKCNT0(0xDE): W7100A core clock count register bit16 ~ 23.
CLK_CNT2 (0xDE)
7
6
5
4
3
2
1
0
Reset
Bit23
Bit22
Bit21
Bit20
Bit19
Bit18
Bit17
Bit16
0x00
Figure 2.33 Core clock count register
CLKCNT0(0xDF): W7100A core clock count register bit24 ~ 31.
CLK_CNT3 (0xDF)
7
6
5
4
3
2
1
0
Reset
Bit31
Bit30
Bit29
Bit28
Bit27
Bit26
Bit25
Bit24
0x00
Figure 2.34 Core clock count register
2.5.11 Peripheral Registers
P0, P1, P2, P3 : Port register. For detail information, please refer to the section 4 ‘I/O
Ports’ for the Functionality of I/O Ports.
TCON(0x88) : Timer0, 1 configuration register. For detail information, please refer to the
section 5.1 ‘Timer 0, 1’ for the Functionality of Timer0 and Timer 1.
TMOD(0x89) : Timer0, 1 control mode register. For detail information, please refer to the
section 5.1 ‘Timer 0, 1’ for the Functionality of Timer0 and Timer 1.
TH0(0x8C), TL0(0x8A) : Counter register of timer 0. For detail information, please refer to
W7100A Datasheet v1.2.5 43
the section 5.1 ‘Timer 0, 1’ for the Functionality of Timer0 and
Timer 1.
TH1(0x8D), TL1(0x8B) : Counter register of timer 1. For detail information, please refer to
the section 5.1 ‘Timer 0, 1’ for the Functionality of Timer0 and
Timer 1.
SCON(0x98) : UART Configuration Register. For detail information, please refer to the
section 6 ‘UART’ for the Functionality of UART.
SBUF(0x99) : UART Buffer Register. For detail information, please refer to the section 6
‘UART’ for the Functionality of UART.
IE(0xA8) : UART Bits in Interrupt Enable Register. For detail information, please refer to the
section 6 ‘UART’ for the Functionality of UART.
IP(0xB8) : UART Bits in Interrupt Priority Register. For detail information, please refer to the
section 6 ‘UART’ for the Functionality of UART.
TA(0xC7) : Timed Access Register. For detail information, please refer to the section 7
‘Watchdog Timer’ for Timed Access Registers of Watchdog Timer.
T2CON(0xC8) : Timer 2 Configuration Register. For detail information, please refer to the
section 5.2 ‘Timer 2’ for the Functionality of Timer 2.
RLDH(0xCB), RLDL(0xCA) : Capture Registers of Timer 2. For detail information, please
refer to the section 5.2 ‘Timer 2’ for the Functionality of Timer
2.
TH2(0xCD), TL2(0xCC) : Counter Register of Timer 2. For detail information, please refer to
the section 5.2 ‘Timer 2’ for the Functionality of Timer 2.
PSW(0xD0) : Program Status Word Register. For detail information, please refer to the
section 1.3.1 ‘ALU’.
WDCON(0xD8) : Watchdog Control Register. For detail information, please refer to the
section 7 ‘Watchdog Timer’.
W7100A Datasheet v1.2.5 44
3 Interrupt
The functions of interrupt pins are described in the table below. All pins are unidirectional.
There are no tri-state signals.
Table 3.1 External Interrupt Pin Description
Pin
Active
Type
Pu/Pd
Description
nINT0/FA6
Low/Falling
I
-
External interrupt 0
nINT1/FA7
Low/Falling
I
-
External interrupt 1
nINT2/FA8
Falling
I
-
External interrupt 2
nINT3/FA9
Falling
I
-
External interrupt 3
nINT4
-
Reserved
TCPIPCore
(nINT5)
Falling
I
-
Interrupt Request Signal for TCPIPCore
The W7100A core is implemented with two levels of interrupt priority control. Each external
interrupt can be in high or low level priority group by setting or clearing a bit in the IP(0xB8)
and EIP(0xF8) registers. External interrupt pins are activated by a falling edge signal.
Interrupt requests are sampled at the rising edge of the system’s clock.
Table 3.2 W7100A Interrupt Summary
Interrupt
Flag
Function
Active
Level/Edge
Flag Reset
Vector
Interrupt
Number
Natural
Priority
IE0
Device pin INT0
Low/Falling
Hardware
0x03
0
1
TF0
Internal, Timer0
-
Hardware
0x0B
1
2
IE1
Device pin INT1
Low/Falling
Hardware
0x13
2
3
TF1
Internal, Timer1
-
Hardware
0x1B
3
4
TI & RI
Internal, UART
-
Software
0x23
4
5
TF2
Internal, Timer2
-
Software
0x2B
5
6
INT2F
Device Pin INT2
Falling
Software
0x43
8
7
INT3F
Device Pin INT3
Falling
Software
0x4B
9
8
INT4F
Reserved
INT5F
TCPIPCore
Interrupt for
TCPIPCore
Falling
Software
0x5B
11
10
WDIF
Internal,
WATCHDOG
-
Software
0x63
12
11
Each interrupt vector can be individually enabled or disabled by changing the corresponding
W7100A Datasheet v1.2.5 45
bit in IE(0xA8) and EIE(0xE8) registers. The IE register contains global interrupt system
disable(0)/enable(1) bit called EA.
IE (0xA8)
7
6
5
4
3
2
1
0
Reset
EA
-
ET2
ES
ET1
EX1
ET0
EX0
0x00
Figure 3.1 Interrupt Enable Register
Note: EA - Enable global interrupt
EX0 - Enable INT0 interrupt
ET0 - Enable Timer0 interrupt
EX1 - Enable INT1 interrupt
ET1 - Enable Timer1 interrupt
ES – Enable UART interrupt
ET2 - Enable Timer2 interrupt
All these bits which generate interrupts can be set or cleared by software, with the same
result by hardware. That is, interrupts can be generated or cancelled by software. The only
exceptions are the request flags IE0 and IE1. If the external interrupt 0 or 1 are programmed
as level-activated, the IE0 and IE1 are controlled by the external source pins nINT0/FA6 and
nINT1/FA7 respectively.
IP (0xB8)
7
6
5
4
3
2
1
0
Reset
-
-
PT2
PS
PT1
PX1
PT0
PX0
0x00
Figure 3.2 Interrupt Priority Register
Note: PX0 - INT0 priority level control (high level at 1)
PT0 - Timer0 priority level control (high level at 1)
PX1 - INT1 priority level control (high level at 1)
PT1 - Timer1 priority level control (high level at 1)
PS - UART priority level control (high level at 1)
PT2 – Timer2 priority level control (high level at 1)
Unimplemented bit - Read as 0 or 1
TCON (0x88)
7
6
5
4
3
2
1
0
Reset
TF1
TR1
TF0
TR0
IE1
IT1
IE0
IT0
0x00
Figure 3.3 Timer0, 1 Configuration Register
Note: IT0 - INT0 level (at 0)/edge (at 1) sensitivity
IT1 - INT1 level (at 0)/edge (at 1) sensitivity
IE0 - INT0 interrupt flag is automatically cleared when processor branches to
W7100A Datasheet v1.2.5 46
interrupt routine
IE1 – INT1 interrupt flag is automatically cleared when processor branches to
interrupt routine
TF0 - Timer0 interrupt (overflow) flag. Automatically cleared when processor
branches to interrupt routine
TF1 – Timer 1 interrupt (overflow) flag. Automatically cleared when processor
branches to interrupt routine
SCON (0x98)
7
6
5
4
3
2
1
0
Reset
SM0
SM1
SM2
REN
TB8
RB8
TI
RI
0x00
Figure 3.4 UART Configuration Register
Note: RI - UART receiver interrupt flag
TI - UART transmitter interrupt flag
EIE (0xE8)
7
6
5
4
3
2
1
0
Reset
-
-
-
EWDI
EINT5
EINT4
EINT3
EINT2
0x00
Figure 3.5 Extended Interrupt Enable Register
Note: EINT2 - Enable external INT2 Interrupt
EINT3 - Enable external INT3 Interrupt
EINT4 – Must be ‘0’, if use the EIE register
EINT5 - Enable TCPIPCore Interrupt
EWDI - Enable WATCHDOG Interrupt
EIP (0xF8)
7
6
5
4
3
2
1
0
Reset
-
-
-
PWDI
PINT5
PINT4
PINT3
PINT2
0x00
Figure 3.6 Extended Interrupt Priority Register
Note: PINT2 - INT2 priority level control (high level at 1)
PINT3 - INT3 priority level control (high level at 1)
PINT4 – Must be set to ‘0’, if use the EIP register
PINT5 - TCPIPCore Interrupt priority level control (high level at 1)
PWDI - WATCHDOG priority level control (high level at 1)
W7100A Datasheet v1.2.5 47
EIF (0x91)
7
6
5
4
3
2
1
0
Reset
-
-
-
-
INT5F
INT4F
INT3F
INT2F
0x00
Figure 3.7 Extended Interrupt Flag Register
Note: INT2F - INT2 interrupt flag. Must be cleared by software
INT3F – INT3 interrupt flag. Must be cleared by software
INT4F – Must be set to ‘0’. if use the EIF register
INT5F - TCPIPCore Interrupt flag. Must be cleared by software
WDCON (0xD8)
7
6
5
4
3
2
1
0
Reset
-
-
-
-
WDIF
WTRF
EWT
RWT
0x00
Figure 3.8 Watchdog Control Register
Note: WDIF - Watchdog Interrupt Flag. WDIF in conjunction with the Enable Wat
chdog Interrupt bit (EIE.4) and EWT provides information such as
whether the Watchdog Timer event has been encountered or not
and what action should be taken. This bit must be cleared by sof
tware before exiting the interrupt service routine. By using softwa
re to enable the WDIF, a Watchdog interrupt is generated. Enable
d software-set WDIF will generate a Watchdog interrupt. Timed Ac
cess Register procedure can be used to modify this bit.
W7100A Datasheet v1.2.5 48
4 I/O Ports
Figure 4.1 Port0 Pull-down register
The GPIO of W7100A has three operating modes 'Pull-up', 'Pull-down' and 'Keep' according to
the SFR value.
The 'Keep' mode can be made by setting up both pull-up and pull-down register simultaneously.
The GPIO keeps its previous value in the 'Keep' operating mode.
The I/O port pin functionalities are described in the following table.
Table 4.1 I/O Ports Pin Description
Pin
Active
Type
Pu/Pd
Description
P0[7:0]
-
IO
-
Port0 input / output
P1[7:0]
-
IO
-
Port1 input / output
P2[7:0]
-
IO
-
Port2 input / output
P3[7:0]
-
IO
-
Port3 input / output
P0 (0x80)
7
6
5
4
3
2
1
0
Reset
P0.7
P0.6
P0.5
P0.4
P0.3
P0.2
P0.1
P0.0
0xFF
Figure 4.2 Port0 Register
P1 (0x90)
7
6
5
4
3
2
1
0
Reset
P1.7
P1.6
P1.5
P1.4
P1.3
P1.2
P1.1
P1.0
0xFF
Figure 4.3 Port1 Register
W7100A Datasheet v1.2.5 49
P2 (0xA0)
7
6
5
4
3
2
1
0
Reset
P2.7
P2.6
P2.5
P2.4
P2.3
P2.2
P2.1
P2.0
0xFF
Figure 4.4 Port2 Register
P3 (0xB0)
7
6
5
4
3
2
1
0
Reset
P3.7
P3.6
P3.5
P3.4
P3.3
P3.2
P3.1
P3.0
0xFF
Figure 4.5 Port3 Register
Read and write accesses are performed in the I/O ports via their corresponding SFR: P0
(0x80), P1 (0x90), P2 (0xA0), and P3 (0xB0). Some port-reading instructions read from the
data registers while others read from the port pin. The “Read-Modify-Write” instructions are
directed to the data registers as shown below.
Table 4.2 Read-Modify-Write Instructions
Instruction
Function Description
ANL
Logic AND
ORL
Logic OR
XRL
Logic exclusive OR
JBC
Jump if bit is set and cleared
CPL
Complement bit
INC, DEC
Increment, decrement byte
DJNZ
Decrement and jump if not zero
MOV Px.y, C
Move carry bit to bit y of port x
CLR Px.y
Clear bit y of port x
SETB Px.y
Set bit y of port x
All other instructions read from a port exclusively through the port pins. All ports pin can be
used as GPIO (General Purpose Input Output). The GPIO of W7100A is shown in the Figure
below. The output driving voltage of GPIO is 0V or 3.3V according to the Px_PD/PU SFR value
or GPIO keeps its previous value in current operation mode.
Px_PU
Px_PD
Status
W7100A Datasheet v1.2.5 50
0
0
-
0
1
Pull-down
1
0
Pull-up
1
1
Keep
P0_PD(0xE3): GPIO0 Pull-down register, the value ‘1’ pull-down the related pin.
P0_PD (0xE3)
7
6
5
4
3
2
1
0
Reset
Port0[7]
Port0[6]
Port0[5]
Port0[4]
Port0[3]
Port0[2]
Port0[1]
Port0[0]
0x00
Figure 4.6 Port0 Pull-down register
P1_PD(0xE4): GPIO1 Pull-down register, the value ‘1’ pull-down the related pin.
P1_PD (0xE4)
7
6
5
4
3
2
1
0
Reset
Port1[7]
Port1[6]
Port1[5]
Port1[4]
Port1[3]
Port1[2]
Port1[1]
Port1[0]
0x00
Figure 4.7 Port1 Pull-down register
P2_PD(0xE5): GPIO2 Pull-down register, the value ‘1’ pull-down the related pin.
P2_PD (0xE5)
7
6
5
4
3
2
1
0
Reset
Port2[7]
Port2[6]
Port2[5]
Port2[4]
Port2[3]
Port2[2]
Port2[1]
Port2[0]
0x00
Figure 4.8 Port2 Pull-down register
P3_PD(0xE6): GPIO3 Pull-down register, the value ‘1’ pull-down the related pin.
P3_PD (0xE6)
7
6
5
4
3
2
1
0
Reset
Port3[7]
Port3[6]
Port3[5]
Port3[4]
Port3[3]
Port3[2]
Port3[1]
Port3[0]
0x00
Figure 4.9 Port3 Pull-down register
P0_PU(0xEB): GPIO0 Pull-up register, the value ‘1’ means pull-up the related pin.
P0_PU (0xEB)
7
6
5
4
3
2
1
0
Reset
Port0[7]
Port0[6]
Port0[5]
Port0[4]
Port0[3]
Port0[2]
Port0[1]
Port0[0]
0x00
Figure 4.10 Port0 Pull-up register
W7100A Datasheet v1.2.5 51
P1_PU(0xEC): GPIO1 Pull-up register, the value ‘1’ means pull-up the related pin.
P1_PU (0xEC)
7
6
5
4
3
2
1
0
Reset
Port1[7]
Port1[6]
Port1[5]
Port1[4]
Port1[3]
Port1[2]
Port1[1]
Port1[0]
0x00
Figure 4.11 Port1 Pull-up register
P2_PU(0xED): GPIO2 Pull-up register, the value ‘1’ means pull-up the related pin.
P2_PU (0xED)
7
6
5
4
3
2
1
0
Reset
Port2[7]
Port2[6]
Port2[5]
Port2[4]
Port2[3]
Port2[2]
Port2[1]
Port2[0]
0x00
Figure 4.12 Port2 Pull-up register
P3_PU(0xEE): GPIO3 Pull-up register, the value ‘1’ means pull-up the related pin.
P3_PU (0xEE)
7
6
5
4
3
2
1
0
Reset
Port3[7]
Port3[6]
Port3[5]
Port3[4]
Port3[3]
Port3[2]
Port3[1]
Port3[0]
0x00
Figure 4.13 Port3 Pull-up register
W7100A Datasheet v1.2.5 52
5 Timers
The W7100A contains two 16-bit timers/counters, Timer0 and Timer 1. In the ‘timer mode’,
the timer registers are incremented by every 12 CLK periods. In “counter mode”, the timer
registers are incremented during the falling transition on their corresponding input pins: T0 or
T1. The input pins are sampled at every CLK period.
5.1 Timers 0, 1
5.1.1 Overview
The Timer0, 1 pin functionalities are described in the following table. All pins are
unidirectional. There are no tri-state output pins and internal signals.
Table 5.1 Timers 0, 1 Pin Description
Pin
Active
Type
Pu/Pd
Description
T0/FCS
Falling
I
-
Timer0 clock
GATE0/FOE
High
I
-
Timer0 clock gate control
T1/FAE
Falling
I
-
Timer1 clock
GATE1/FA0
High
I
-
Timer1 clock gate control
Timer0 and Timer 1 are fully compatible with the standard 8051 timers. Each timer consists
of two 8-bit registers, TH0 (0x8C) and TL0 (0x8A), TH1 (0x8D) and TL1 (0x8B). The timers
work in four modes which are described below.
Table 5.2 Timers 0, 1 Mode
M1
M0
Mode
Function Description
0
0
0
THx operates as a 8-bit timer/counter with a divided-by-32
prescaler served by lower 5-bit of TLx
0
1
1
16-bit timer/counter. THx and TLx are cascaded.
1
0
2
TLx operates as a 8-bit timer/counter with 8bit auto-reload by
THx.
1
1
3
TL0 is configured as a 8-bit timer/counter controlled by the
standard Timer0 bits. TH0 is a 8-bit timer controlled by Timer 1
control bits. Timer 1 holds its count.
W7100A Datasheet v1.2.5 53
TMOD (0x89)
Timer1
Timer0
7
6
5
4
3
2
1
0
Reset
GATE
CT
M1
M0
GATE
CT
M1
M0
0x00
Figure 5.1 Timer0, 1 Control Mode Register
Note: GATE - Gating control
1: Timer x is enabled while GATEx pin is at high and TRx control b
it is set
0: Timer x is enabled while TRx control bit is set
CT - Counter or timer select bit
1: Counter mode, Timer x clock source from Tx pin
0: Timer mode, internally clocked
M1, M0 – Mode select bits
TCON (0x88)
7
6
5
4
3
2
1
0
Reset
TF1
TR1
TF0
TR0
IE1
IT1
IE0
IT0
0x00
Figure 5.2 Timer0, 1 Configuration Register
Note: TR0 - Timer0 run control bit
1: Enabled
0: Disabled
TR1 - Timer 1 run control bit
1: Enabled
0: Disabled
External input pins, GATE0 and GATE1, can be programmed to function as a gate to
facilitate pulse width measurements.
5.1.2 Interrupts
Timer0, 1 interrupt related bits are shown below. An interrupt can be toggled by the IE
register, and priorities can be configured in the IP register.
IE (0xA8)
7
6
5
4
3
2
1
0
Reset
EA
-
ET2
ES
ET1
EX1
ET0
EX0
0x00
Figure 5.3 Interrupt Enable Register
Note: EA - Enable global interrupts
ET0 - Enable Timer0 interrupts
ET1- Enable Timer1 interrupts
W7100A Datasheet v1.2.5 54
IP (0xB8)
7
6
5
4
3
2
1
0
Reset
-
-
PT2
PS
PT1
PX1
PT0
PX0
0x00
Figure 5.4 Interrupt Priority Register
Note: PT0 - Enable global interrupts
PT1 - Enable Timer0 interrupts
Unimplemented bit - Read as 0 or 1
TCON (0x88)
7
6
5
4
3
2
1
0
Reset
TF1
TR1
TF0
TR0
IE1
IT1
IE0
IT0
0x00
Figure 5.5 Timer0, 1 Configuration Register
Note: TF0 - Timer0 interrupt (overflow) flag. Automatically cleared when proce
ssor branches to interrupt routine
TF1 - Timer1 interrupt (overflow) flag. Automatically cleared when proces
sor branches to interrupt routine
All of the bits which generate interrupts can be set or cleared by software, with the same
result by hardware. That is, interrupts can be generated or cancelled by software.
Table 5.3 Timer0, 1 interrupts
Interrupt
Flag
Function
Active
Level/Edge
Flag Resets
Vector
Natural Priority
TF0
Internal, Timer0
-
Hardware
0x0B
2
TF1
Internal, Timer1
-
Hardware
0x1B
4
5.1.3 Timer0 – Mode0
The Timer0 register is configured as a 13-bit register (8bit: Timer, 5bit: prescaler). As the all
counts (valid bits) roll over from 1 to 0, Timer0 interrupt flag TF0 is set. The timer starts
counting when TCON.4 =1 and either TMOD.3 = 0 or GATE0 = 1. By setting TMOD.3 = 1, the
external input GATE0 can control Timer0 to manage the pulse width measurements. The 13-
bit register consists of 8 bits TH0 and 5 bits of TL0. The upper 3 bits of TL0 should be ignored.
Refer to the following Figure for details.
W7100A Datasheet v1.2.5 55
Figure 5.6 Timer Counter0, Mode0: 13-Bit Timer/Counter
5.1.4 Timer0 – Mode1
Mode1 is the same as Mode0, except that the timer register is running with all 16 bits.
Mode1 is shown in the Figure below.
Figure 5.7 Timer/Counter0, Mode1: 16-Bit Timer/Counter
5.1.5 Timer0 – Mode2
Mode2 configures the timer register as a 8-bit counter TL0 with automatic reload as shown
in the Figure below. During an overflow from TL0, it sets TF0 and reloads the contents of TH0
into TL0. TH0 remains unchanged after the reload is completed.
W7100A Datasheet v1.2.5 56
Figure 5.8 Timer/Counter0, Mode2: 8-Bit Timer/Counter with Auto-Reload
5.1.6 Timer0 – Mode3
In this mode, the TL0 and TH0 are divided into two separate counters. The following Figure
shows the logic for Timer0 running in Mode3. The TL0 uses the Timer0 control bits: C/T, GATE,
TR0, GATE0 and TF0. And the TH0 is locked into a timer function and uses TR1 and TF1 flags
from Timer 1 and controls Timer 1 interrupt. Mode3 is used in applications which require an
extra 8-bit timer/counter. When Timer0 is in Mode3, Timer 1 can be turned on/off by
switching itself into Mode3, or can still be used by the serial channel as a baud rate generator,
or in any application where interrupt from Timer 1 is not required.
Figure 5.9 Timer/Counter0, Mode3: Two 8-Bit Timers/Counters
W7100A Datasheet v1.2.5 57
5.1.7 Timer1 – Mode0
In this mode, the Timer1 register is configured as a 13-bit register (8bit: Timer, 5bit:
prescaler). As the all counts (valid bits) roll over from 1 to 0, Timer 1 interrupt flag TF1 is set.
The counted input is enabled to Timer 1 when TCON.6 = 1 and either TMOD.6 = 0 or GATE1 = 1.
(Setting TMOD.7 = 1 allows Timer 1 controlled by external input GATE1, to facilitate pulse
width measurements). The 13-bit register consists of 8 bits TH1 and the lower 5 bits of TL1.
The upper 3 bits of TL1 are indeterminate and should be ignored. Refer to the following
Figure for detail.
Figure 5.10 Timer/Counter1, Mode0: 13-Bit Timer/Counter
5.1.8 Timer1 – Mode1
Mode1 is the same as Mode0, except that the timer register is running with all 16 bits.
Mode1 is shown in the Figure below.
Figure 5.11 Timer/Counter1, Mode1: 16-Bit Timers/Counters
W7100A Datasheet v1.2.5 58
5.1.9 Timer1 – Mode2
Mode2 configures timer register as 8-bit counter TL1, with automatic reload as shown in
Figure below. Overflow from TL1 only sets TF1, but also automatically reloads TL1 with the
contents of TH1. The reload leaves TH1 unchanged.
Figure 5.12 Timer/Counter1, Mode2: 8-Bit Timer/Counter with Auto-Reload
5.1.10 Timer1 – Mode3
Timer1 in Mode3 holds counting. The effect is the same as setting TR1 = 0 because it is used
for Timer0-Mode3. For more detail, please refer to the section 5.1.6 ‘Timer0-Mode3’.
W7100A Datasheet v1.2.5 59
5.2 Timer2
5.2.1 Overview
The Timer2 pin functionalities are described in the following table. All pins are
unidirectional. There are no tri-state output pins and internal signals.
Table 5.4 Timer2 Pin Description
Pin
Active
Type
Pu/Pd
Description
T2/FA1
Falling
I
-
Timer2 external clock input
T2EX/FA2
Falling
I
-
Timer2 capture/reload trigger
Timer2 of W7100A is fully compatible with the standard 8051 Timer2. A total of five SFR are
used to control Timer2 operation, TH2/TL2 (0xCD/0xCC) counter registers, RLDH/RLDL
(0xCB/0xCA) capture registers, and T2CON (0xC8) control register. Timer2 works under three
modes selected by T2CON bits as shown in the table below.
Table 5.5 Timer2 Modes
RCLK,TCLK
CPRL2
TR2
Function Description
0
0
1
16-bit auto-reload mode. TF2 bit is set when Timer2
overflows. TH2 and TL2 registers are reloaded with 16-
bit value from RLDH and RLDL.
0
1
1
16-bit capture mode. TF2 bit is set when Timer2
overflows. When EXEN2=1 and T2EX pin is on the falling
edge, TH2 and TL2 register values are stored into RLDH
and RLDL.
1
X
1
Baud rate generator for UART interface
X
X
0
Timer2 is off.
T2CON (0xC8)
7
6
5
4
3
2
1
0
Reset
TF2
EXF2
RCLK
TCLK
EXEN2
TR2
CT2
CPRL2
0x00
Figure 5.13 Timer2 Configuration Register
Note: EXF2 – indicates a Falling edge in the T2EX pin when EXEN2=1. Must be cl
eared by software
RCLK - Receive clock enable
0: UART receiver is clocked by Timer1 overflow pulses
1: UART receiver is clocked by Timer2 overflow pulses
TCLK - Transmit clock enable
0: UART transmitter is clocked by Timer1 overflow pulses
W7100A Datasheet v1.2.5 60
1: UART transmitter is clocked by Timer2 overflow pulses
EXEN2 - Enable T2EX pin functionality
0: Ignore T2EX events
1: Allow capture or reload as a result of T2EX pin falling edge
TR2 - Start/Stop Timer2
0: Stop
1: Start
CT2 - Timer/Counter select
0: Internally clocked timer
1: External event counter. Clock source is T2 pin
CPRL2 - Capture/Reload select
0: Automatic reload occurs when Timer2 overflow or falling edge of
the T2EX pin with EXEN2=1. When RCLK or TCLK is set, this bit
is ignored and automatic reload when Timer2 overflows.
1: On the falling edge of T2EX pin, capture is activated when EXEN
2=1.
Figure 5.14 Timer/Counter2, 16-Bit Timer/Counter with Auto-Reload
5.2.2 Interrupts
The interrupt bits for Timer2 are shown below. An interrupt can be toggled by the IE register,
and priorities can be configured by the IP register.
IE (0xA8)
7
6
5
4
3
2
1
0
Reset
EA
-
ET2
ES
ET1
EX1
ET0
EX0
0x00
Figure 5.15 Interrupt Enable Register — Timer2
W7100A Datasheet v1.2.5 61
Note: EA - Enable global interrupts
ET2 - Enable Timer2 interrupts
IP (0xB8)
7
6
5
4
3
2
1
0
Reset
-
-
PT2
PS
PT1
PX1
PT0
PX0
0x00
Figure 5.16 Interrupt Priority Register — Timer2
Note: PT2 - Timer2 interrupt priority level control (high level at 1)
Unimplemented bit - Read as 0 or 1
T2CON (0xC8)
7
6
5
4
3
2
1
0
Reset
TF2
EXF2
RCLK
TCLK
EXEN2
TR2
CT2
CPRL2
0x00
Figure 5.17 Timer2 Configuration Register — TF2
Note: TF2 – Timer2 interrupt (overflow) flag. It must be cleared by software. T
his flag will not be set when either RCLK or TCLK is set.
Figure 5.18 Timer/Counter2, 16-Bit Timer/Counter with Capture Mode
All of the bits that generate interrupts can be set or cleared by software, with the same
result by hardware. That is, interrupts can be generated or cancelled by software.
W7100A Datasheet v1.2.5 62
Table 5.6 Timer2 Interrupt
Interrupt
Flag
Function
Active
Level/Edge
Flag Resets
Vector
Natural Priority
TF2
Internal, Timer2
-
Software
0x2B
6
Interrupt is generated at the falling edge of T2EX pin with EXEN2 bit enabled.
Using the 0x2B vector, EXF2 is set by this interrupt, but the TF2 flag remains unchanged.
Figure 5.19 Timer2 for Baud Rate Generator Mode
W7100A Datasheet v1.2.5 63
6 UART
The UART of W7100A operates in full duplex mode which is capable of receiving and
transmitting at the same time. Since the W7100A is double-buffered, the receiver is capable
of receiving data while the first byte of the buffer is not read. During a read operation, the
SBUF reads from the receive register. On the other hand, SBUF loads the data into the
transmit register during a send operation. The UART has 4 different modes which include one
in synchronous mode and three in asynchronous modes. Modes 2 and 3 include a special
feature for multiprocessor communication. This feature is enabled by setting the SM2 bit in
the SCON register. The master processor sends out the first address byte which identifies the
target slave. An address byte differs from a data byte in that the 9th bit is 1 in an address byte
and 0 in a data byte. With SM2 = 1, no slave will be interrupted by a data byte, while an
address byte will interrupt all slaves. The addressed slave will clear its SM2 bit and prepare to
receive the data bytes that will be coming. The slaves that were not being addressed leave
their SM2 set and ignore the incoming data.
The pin functionalities of UART are described in the following table.
Table 6.1 UART Pin Description
Pin
Active
Type
Pu/Pd
Description
RXD
-
I
Pu
Serial receiver input / output
TXD
-
O
-
Serial transmitter
The UART of W7100A is fully compatible with the standard 8051 UART. The UART related
registers are: SBUF (0x99), SCON (0x98), PCON (0x87), IE (0xA8) and IP (0xB8). The UART data
buffer (SBUF) consists of two registers: transmit and receive. When data is written into the
SBUF transmit register, the sending process begins. Similarly, data is read from the receive
register during the receiving process.
SBUF (0x99)
7
6
5
4
3
2
1
0
Reset
SB7
SB6
SB5
SB4
SB3
SB2
SB1
SB0
0x00
Figure 6.1 UART Buffer Register
SCON (0x98)
7
6
5
4
3
2
1
0
Reset
SM0
SM1
SM2
REN
TB8
RB8
TI
RI
0x00
Figure 6.2 UART Configuration Register
Note: SM2 - Enable a multiprocessor communication feature
SM1 - Set baud rate
SM0 - Set baud rate
W7100A Datasheet v1.2.5 64
REN – ‘1’ : enable serial receive
‘0’: disable serial receive
TB8 - The 9th transmitted data bit in Modes 2 and 3. This bit is enabled
depending on the MCU’s operation (parity check, multiprocessor
communication, etc.),
RB8 - In Modes 2 and 3, it is the 9th bit of data received. In Mode1, if S
M2 is 0, RB08 is a stop bit. In Mode0, this bit is not used.
The UART modes are presented in the table below.
Table 6.2 UART Modes
SM0
SM1
Mode
Description
Baud Rate
0
0
0
Shift register
fosc/12
0
1
1
8-bit UART
Variable
1
0
2
9-bit UART
fosc/32 or /64
1
1
3
9-bit UART
Variable
The UART baud rates are presented below.
Table 6.3 UART Baud Rates
Mode
Baud Rate
Mode0
fosc/12
Mode1,3
Time1 overflow rate or Timer2 overflow rate
Mode2
SMOD0 = 0 fosc/64
SMOD0 = 1 fosc/32
The SMOD0 bit is located in the PCON register.
PCON (0x87)
7
6
5
4
3
2
1
0
Reset
SMOD0
SMOD1
-
PWE
-
0
0
0
0x00
Figure 6.3 UART Bits in Power Configuration Register
Note: SMOD0 - Bit for UART baud rate
Unimplemented bit - Read as 0 or 1
Bits 2-0 must be written as 0
6.1 Interrupts
UART interrupt related bits are shown below. An interrupt can be toggled by the IE register,
and priorities can be configured by the IP register.
W7100A Datasheet v1.2.5 65
IE (0xA8)
7
6
5
4
3
2
1
0
Reset
EA
-
ET2
ES
ET1
EX1
ET0
EX0
0x00
Figure 6.4 UART Bits in Interrupt Enable Register
Note: ES - RI & TI interrupt enable flag
IP (0xB8)
7
6
5
4
3
2
1
0
Reset
-
-
PT2
PS
PT1
PX1
PT0
PX0
0x00
Figure 6.5 UART Bits in Interrupt Priority Register
Note: SMOD0 - Bit for UART baud rate
Unimplemented bit - Read as 0 or 1
SCON (0x98)
7
6
5
4
3
2
1
0
Reset
SM0
SM1
SM2
REN
TB08
RB08
TI
RI
0x00
Figure 6.6 UART Configuration Register
Note: TI – Transmit interrupt flag, automatically set after completion of a serial
transfer. It must be cleared by software.
RI – Receive interrupt flag, automatically set after completion of a serial
reception. It must be cleared by software.
All of the bits that generate interrupts can be set or cleared by software, with the same
result by hardware. That is, interrupts can be generated or cancelled by software.
Table 6.4 UART Interrupt
Interrupt
Flag
Function
Active
Level/Edge
Flag Resets
Vector
Natural Priority
TI & RI
Internal, UART
-
software
0x23
5
6.2 Mode0, Synchronous
TXD output is a shift clock. The baud rate is fixed at 1/12 of the CLK clock frequency. Eight
bits are transmitted with LSB first. Reception is initialized by setting the flags in SCON as
follows: RI = 0 and REN = 1.
W7100A Datasheet v1.2.5 66
Figure 6.7 Timing Diagram for UART Transmission Mode0 (clk = 88.4736 MHz)
6.3 Mode1, 8-Bit UART, Variable Baud Rate, Timer 1 or 2
Clock Source
The pin RXD serves as an input while TXD serves as an output for the serial communication.
10 bits are transmitted in the following sequence: a start bit (always 0), 8 data bits (LSB first),
and a stop bit (always 1). During data reception, a start bit synchronizes the transmission.
Next, the 8 data bits can be accessed by reading SBUF, and the stop bit triggers the flag RB08
in SFR SCON (0x98). The baud rate is variable and dependent on Timer 1 or Timer 2 mode. To
enable Timer 2 clocking, set the TCLK and RCLK bits which are located in the T2CON (0xC8)
register.
Figure 6.8 Timing Diagram for UART Transmission Mode1
6.4 Mode2, 9-Bit UART, Fixed Baud Rate
This mode is almost identical to Mode1 except that the baud rate is fixed at 1/32 or 1/64 of
CLK clock frequency, and 11 bits are transmitted or received in the following sequence: A
start bit (0), 8 data bits (LSB first), a programmable 9th bit, and a stop bit (1). The 9th bit
can be used to control the parity of the UART interface. During a transmission, the TB08 bit in
SCON is outputted as the 9th bit. While receiving data, the 9th bit changes the RB08 bit in
SCON.
Figure 6.9 Timing Diagram for UART Transmission Mode2
W7100A Datasheet v1.2.5 67
6.5 Mode3, 9-Bit UART, Variable Baud Rate, Timer1 or 2
Clock Source
The only difference between Mode2 and Mode3 is the baud rate in Mode3 is variable. Data
reception is enabled when REN = 1. The baud rate is variable and dependent on Timer 1 or
Timer 2 mode. To enable Timer 2 clocking, set the TCLK and RCLK bits which are located in
the T2CON (0xC8) register.
Figure 6.10 Timing Diagram for UART Transmission Mode3
6.6 Examples of Baud Rate Setting
Table 6.5 Examples of Baud Rate Setting
Baud Rate(bps)
Timer 1 / Mode2
Timer 2
TH1(0x8D)
RLDH(0xCB), RLDL(0xCA)
SMOD = ‘0’
SMOD = ‘1’
2400
160(0xA0)
64(0x40)
64384(0XFB80)
4800
208(0xD0)
160(0xA0)
64960(0xFDC0)
9600
232(0xE8)
208(0xD0)
65248(0xFEE0)
14400
240(0xF0)
224(0xE0)
65344(0XFF40)
19200
244(0xF4)
232(0xE8)
65392(0XFF70)
28800
248(0xF8)
240(0xF0)
65440(0xFFA0)
38400
250(0xFA)
244(0xF4)
65464(0XFFB8)
57600
252(0xFC)
248(0xF8)
65488(0xFFD0)
115200
254(0xFE)
252(0xFC)
65512(0xFFE8)
230400
255(0xFF)
254(0xFE)
65524(0xFFF4)
Note: Baud Rate calculation formula
Using Timer1 – Baud Rate = ( 2SMOD / 32 ) * ( Clock Frequency / 12( 256 – TH1 ) )
Using Timer2 – Baud Rate = Clock Frequency / ( 32 * ( 65536 – ( RLDH, RLDL ) ) )
W7100A Datasheet v1.2.5 68
7 Watchdog Timer
7.1 Overview
The Watchdog Timer is driven by the main system clock that is supplied by a series of dividers
as shown in the Figure below. The divider output is selectable and determines the timeout
intervals. When the timeout is reached, an interrupt flag will be set, and if enabled, a reset
will be occurred. When interrupt enable bit and global interrupt are enabled, the interrupt
flag will activate the interrupts. The reset and interrupt are completely discrete functions
that may be acknowledged separately, together or even ignored depending on the application.
Figure 7.1 Watchdog Timer Structure
7.2 Interrupts
Watchdog interrupt related bits are shown below. An interrupt can be turned on/off by the
IE (0xA8) and EIE (0xE8) registers, and high/low priorities can be set in the EIP EIP (0xF8)
register. The IE contains global interrupt system disable (0) / enable (1) bit called EA.
IE (0xA8)
7
6
5
4
3
2
1
0
Reset
EA
-
ET2
ES
ET1
EX1
ET0
EX0
0x00
Figure 7.2 Interrupt Enable Register
EIE (0xE8)
7
6
5
4
3
2
1
0
Reset
-
-
-
EWDI
EINT5
EINT4
EINT3
EINT2
0x00
Figure 7.3 Extended Interrupt Enable Register
Note: EA - Enable global interrupt
EWDI - Enable Watchdog interrupt
W7100A Datasheet v1.2.5 69
EIP (0xF8)
7
6
5
4
3
2
1
0
Reset
-
-
-
PWDI
PINT5
PINT4
PINT3
PINT2
0x00
Figure 7.4 Extended interrupt Priority Register
Note: PWDI - Watchdog priority level control (high level at 1)
Unimplemented bit - Read as 0 or 1
WDCON (0xD8)
7
6
5
4
3
2
1
0
Reset
-
-
-
-
WDIF
WTRF
EWT
RWT
0x00
Figure 7.5 Watchdog Control Register
Note: WDIF - Watchdog Interrupt Flag. WDIF in conjunction with Enable Watchd
og Interrupt bit (EIE.4) and EWT, indicates if a watchdog timer e
vent has occurred and what action should be taken. This bit mu
st be cleared by software before exiting the interrupt service ro
utine or another interrupt is generated. Setting WDIF in software
will generate a watchdog interrupt if enabled. User must use ‘Ti
med Access Register’ when clear this WDIF bit. Please refer to
the section 7.8 ‘Timed Access’ procedure.
All of the bits that generate interrupts can be set or cleared by software, with the same
result by hardware. That is, interrupts can be generated or cancelled by software.
Table 7.1 Watchdog Interrupt
Interrupt Flag
Function
Active Level/Edge
Flag Reset
Vector
Natural Priority
WDIF
Internal,
Watchdog
-
Software
0x63
11
7.3 Watchdog Timer Reset
The Watchdog Timer reset operates as follows. Once the timeout interval is initialized, the
system restarts the Watchdog first by using RWT. Then, the reset mode is enabled by the EWT
(Enable Watchdog Timer reset = WDCON.1) bit. Before the timer reaches the user selected
terminal value, the software can set the RWT (Reset Watchdog Timer = WDCON.0) bit. If RWT
is set before the timeout is reached, the timer will start over. If the timeout is reached
without RWT being set, the Watchdog will reset the MCU. The Hardware automatically clears
RWT after sets the RWT by software. When a reset occurs, the WTRF (Watchdog Timer reset
Flag = WDCON.2) will automatically set to indicate the cause of the reset; however, software
must clear this bit manually. Do not use the watchdog timer reset, because it can cause the
abnormal operation the RESET. Instead, we recommend you to use watchdog timer interrupt.
W7100A Datasheet v1.2.5 70
7.4 Simple Timer
The Watchdog Timer is a free running timer. In timer mode with reset disabled (EWT = 0)
and interrupt functions disabled (EWDI = 0), the timer counts up to pre-programmed interval
in WD[1:0] which will enable the Watchdog interrupt flag. By resetting the RWT bit, this timer
can operate in polled timeout mode. The WDIF bit can be cleared by software or reset. The
Watchdog interrupt is available for application which requires a long timer. The interrupt is
enabled by using the EWDI (Enable WatchDog timer Interrupt = EIE.4) bit. When a timeout
occurs, the Watchdog Timer will set the WDIF bit (WDCON.3), and an interrupt will occur if
the global interrupt enable (EA) is set. Note that WDIF is set to 512 clocks before a
potential Watchdog reset. The Watchdog interrupt flag indicates the source of the interrupt,
and must be cleared by software. When the Watchdog interrupt is used properly, the
Watchdog reset allows the interrupt software to monitor the system for any errors.
7.5 System Monitor
If the EWT bit of WDCON was set, W7100A will reset when a Watchdog timeout occurs. User
can use the Watchdog timer as a system monitor using this function. For example, assuming
that an unexpected code was running, there is no RWT clear routine because this code is not
designed by user; resulting a Watchdog timeout to occur, and the W7100A will reset. User can
escape unexpected state by using this method.
7.6 Watchdog Related Registers
The Watchdog Timer has several SFR bits that are used during its operation. These bits can
be utilized as a reset source, interrupt source, software polled timer or any combination of
the three. Both the reset and interrupt have status flags. The Watchdog also has a bit which
restarts the timer. The table below shows the bit locations with descriptions.
Table 7.2 Summary for Watchdog Related Bits
Bit Name
Register
Bit Position
Description
EWDI
EIE
EIE.4
Enable Watchdog Timer Interrupt
PWDI
EIP
EIP.4
Priority of Watchdog Timer Interrupt
WD[1:0]
CKCON
CKCON.7-6
Watchdog Interval
RWT
WDCON
WDCON.0
Reset Watchdog Timer
EWT
WDCON.1
Enable Watchdog Timer reset
WTRF
WDCON.2
Watchdog Timer reset flag
WDIF
WDCON.3
Watchdog Interrupt flag
The Watchdog Timer is not disabled during a Watchdog timeout reset, but it restarts the
timer. Control bits that support Watchdog operation are described in next subsections.
W7100A Datasheet v1.2.5 71
7.7 Watchdog Control
Watchdog control bits are described below. Please note that access (write) to this register
has to be performed using ‘7.8 Timed Access Registers’ procedure.
WDCON (0xD8)
7
6
5
4
3
2
1
0
Reset
-
-
-
-
WDIF
WTRF
EWT
RWT
0x00
Figure 7.6 Watchdog Control Register
Note: WTRF - Watchdog Timer reset Flag. A Watchdog Timer reset has occurred
when this flag is enabled; however, when using software to enable
this flag, the Watchdog timer reset is not triggered. During a res
et, this flag is cleared otherwise it should be cleared by software.
The Watchdog Timer has no effect on this bit if EWT bit is clear
ed.
EWT – Enable the Watchdog Timer reset. This bit controls the Watchdog
Timer to reset the microcontroller, and has no effect on the abil
ity of the Watchdog Timer to generate a Watchdog interrupt. Tim
ed Access procedure must be used to modify this bit.
0 : Watchdog Timer timeout does not reset microcontroller
1 : Watchdog Timer timeout resets microcontroller
RWT – Reset the Watchdog Timer. Setting RWT resets the Watchdog Timer
count. Timed Access procedure must be followed to enable this
bit before the Watchdog Timer expires, reset or interrupt will be
generated if the RWT is enabled.
Unimplemented bit - Read as 0 or 1
The table below summarizes Watchdog control bits and the functions.
Table 7.3 Watchdog Bits and Actions
EWT
EWDI
WDIF
Result
X
X
0
No Watchdog event.
0
0
1
Watchdog timeout has expired. No interrupt has been generated.
0
1
1
Watchdog interrupt has occurred.
1
0
1
Watchdog timeout has expired. No interrupt has been generated.
Watchdog Timer reset will occur in 512 clock periods (CLK pin) if
RWT is not strobed.
1
1
1
Watchdog interrupt has occurred. Watchdog Timer reset will
occur in 512 clock periods (CLK pin) if RWT is not set using Timed
W7100A Datasheet v1.2.5 72
Access procedure.
7.7.1 Clock Control
The Watchdog timeout selection is made using bits WD[1:0] as shown in the Figure below.
CKCON (0x8E)
7
6
5
4
3
2
1
0
Reset
WD1
WD0
-
-
-
MD2
MD1
MD0
0x03
Figure 7.7 Clock Control register – Watchdog bits
Clock control register CKCON(0x8E) contains WD[1:0] bits to select Watchdog Timer timeout
period. The Watchdog is clocked directly from the CLK pin. The Watchdog has four timeout
selections based on the input CLK clock frequency as shown in the Figure 7.1. The selections
are a pre-selected number of clocks.
*W7100A clock frequency = 88.4736MHz
Table 7.4 Watchdog Intervals
WD[1:0]
Watchdog Interval
Number of Clocks
00
217
131072
01
220
1048576
10
223
8388608
11
226
67108864
Note that the time period shown above is for the interrupt events. When the reset is
enabled, it will activate 512 clocks later regardless of the interrupt. Therefore, the actual
Watchdog timeout is the number of clocks chosen from Watchdog intervals plus 512 clocks
(always CLK pin).
7.8 Timed Access Registers
Since the WDCON is timed access register, user must use following procedure when set a
value to WDCON. TA is an SFR addressed 0xC7.
MOV TA, #0xAA
MOV TA, #0x55
;Any direct addressing instruction writing timed access register
User always use this sequence every setting the WDCON
Table 7.5 Timed Access Registers
Register name
Description
WDCON(0xD8)
Watchdog configuration
W7100A Datasheet v1.2.5 73
8 TCPIPCore
8.1 Memory Map
TCPIPCore is composed of Common Register, SOCKET Register, TX Memory, and RX Memory as
shown below.
Figure 8.1 TCPIPCore Memory Map
8.2 Registers list
8.2.1 Common Registers
Address offset
Symbol
Description
0xFE0000
MR
Mode Register
0xFE0001
GAR0
GAR (Gateway Address Register)
0xFE0002
GAR1
0xFE0003
GAR2
0xFE0004
GAR3
0xFE0005
SUBR0
SUBR (Subnet Mask Register)
0xFE0006
SUBR1
W7100A Datasheet v1.2.5 74
0xFE0007
SUBR2
0xFE0008
SUBR3
0xFE0009
SHAR0
SHAR (Source Hardware Address Register)
0xFE000A
SHAR1
0xFE000B
SHAR2
0xFE000C
SHAR3
0xFE000D
SHAR4
0xFE000E
SHAR5
0xFE000F
SIPR0
SIPR (Source IP Address Register)
0xFE0010
SIPR1
0xFE0011
SIPR2
0xFE0012
SIPR3
0xFE0013
Reserved
0xFE0014
0xFE0015
IR
Interrupt Register
0xFE0016
IMR
Interrupt Mask Register
0xFE0017
RTR0
RTR (Retransmission Timeout-value Register)
0xFE0018
RTR1
0xFE0019
RCR
RCR (Retransmission Retry-count Register)
0xFE001A
Reserved
0xFE001B
0xFE001C
PATR0
PART (PPPoE Authentication Register)
0xFE001D
PATR1
0xFE001E
PPPALGO
PPPoE Authentication Algorithm Register
0xFE001F
VERSIONR
W7100A Version Register
0xFE0020
~
0xFE0027
Reserved
0xFE0028
PTIMER
PPP Link Control Protocol Request Timer Register
0xFE0029
PMAGIC
PPP LCP Magic Number Register
0xFE002A
~
0xFE002F
Reserved
0xFE0030
INTLEVEL0
INTLEVEL (Interrupt Low Level Timer Register)
0xFE0031
INTLEVEL1
W7100A Datasheet v1.2.5 75
0xFE0032
Reserved
0xFE0033
0xFE0034
IR2
SOCKET Interrupt Register
8.2.2 SOCKET Registers
Address offset
Symbol
Description
0xFE4000
S0_MR
SOCKET 0 Mode Register
0xFE4001
S0_CR
SOCKET 0 Command Register
0xFE4002
S0_IR
SOCKET 0 Interrupt Register
0xFE4003
S0_SR
SOCKET 0 SOCKET Status Register
0xFE4004
S0_PORT0
S0_PORT (SOCKET 0 Source Port Register)
0xFE4005
S0_PORT1
0xFE4006
S0_DHAR0
S0_DHAR (SOCKET 0 Destination Hardware Address Register)
0xFE4007
S0_DHAR1
0xFE4008
S0_DHAR2
0xFE4009
S0_DHAR3
0xFE400A
S0_DHAR4
0xFE400B
S0_DHAR5
0xFE400C
S0_DIPR0
S0_DIPR (SOCKET 0 Destination IP Address Register)
0xFE400D
S0_DIPR1
0xFE400E
S0_DIPR2
0xFE400F
S0_DIPR3
0xFE4010
S0_DPORT0
S0_DPORT (SOCKET 0 Destination Port Register)
0xFE4011
S0_DPORT1
0xFE4012
S0_MSSR0
S0_MSSR (SOCKET 0 Maximum Segment Size Register)
0xFE4013
S0_MSSR1
0xFE4014
S0_PROTO
SOCKET 0 Protocol of IP Header Field Register in IP raw
mode
0xFE4015
S0_TOS
SOCKET 0 IP Type of Service(TOS) Register
0xFE4016
S0_TTL
SOCKET 0 IP Time to Live(TTL) Register
0xFE4017
~
0xFE401D
Reserved
W7100A Datasheet v1.2.5 76
0xFE401E
S0_RXMEM_SIZE
SOCKET 0 Receive Memory Size Register
0xFE401F
S0_TXMEM_SIZE
SOCKET 0 Transmit Memory Size Register
0xFE4020
S0_TX_FSR0
S0_TX_FSR (SOCKET 0 Transmit Free Memory Size Register)
0xFE4021
S0_TX_FSR1
0xFE4022
S0_TX_RD0
S0_TX_RD0
(SOCKET 0 Transmit Memory Read Pointer Register)
0xFE4023
S0_TX_RD1
0xFE4024
S0_TX_WR0
S0_TX_WR
(SOCKET 0 Transmit Memory Write Pointer Register)
0xFE4025
S0_TX_WR1
0xFE4026
S0_RX_RSR0
S0_RX_RSR
(SOCKET 0 Received Data Size Register)
0xFE4027
S0_RX_RSR1
0xFE4028
S0_RX_RD
S0_RX_RD
(SOCKET 0 Receive Memory Read Pointer Register)
0xFE4029
S0_RX_RD1
0xFE402A
S0_RX_WR
S0_RX_WR
(SOCKET 0 Receive Memory Write Pointer Register)
0xFE402B
S0_RX_WR1
0xFE402C
S0_IMR
SOCKET 0 Interrupt Mask Register
0xFE402D
S0_FRAG0
S0_FRAG
(SOCKET 0 Fragment Field Value in IP Header Register)
0xFE402E
S0_FRAG1
0xFE402F
~
0xFE40FF
Reserved
0xFE4100
S1_MR
SOCKET 1 Mode Register
0xFE4101
S1_CR
SOCKET 1 Command Register
0xFE4102
S1_IR
SOCKET 1 Interrupt Register
0xFE4103
S1_SR
SOCKET 1 SOCKET Status Register
0xFE4104
S1_PORT0
S1_PORT (SOCKET 1 Source Port Register)
0xFE4105
S1_PORT1
0xFE4106
S1_DHAR0
S1_DHAR (SOCKET 1 Destination Hardware Address Register)
0xFE4107
S1_DHAR1
0xFE4108
S1_DHAR2
0xFE4109
S1_DHAR3
0xFE410A
S1_DHAR4
0xFE410B
S1_DHAR5
0xFE410C
S1_DIPR0
S1_DIPR (SOCKET 1 Destination IP Address Register)
0xFE410D
S1_DIPR1
W7100A Datasheet v1.2.5 77
0xFE410E
S1_DIPR2
0xFE410F
S1_DIPR3
0xFE4110
S1_DPORT0
S1_DPORT (SOCKET 1 Destination Port Register)
0xFE4111
S1_DPORT1
0xFE4112
S1_MSSR0
S1_MSSR (SOCKET 1 Maximum Segment Size Register)
0xFE4113
S1_MSSR1
0xFE4114
S1_PROTO
SOCKET 1 Protocol of IP Header Field Register in IP raw
mode
0xFE4115
S1_TOS
SOCKET 1 IP Type of Service(TOS) Register
0xFE4116
S1_TTL
SOCKET 1 IP Time to Live(TTL) Register
0xFE4117
~
0xFE411D
Reserved
0xFE411E
S1_RXMEM_SIZE
SOCKET 1 Receive Memory Size Register
0xFE411F
S1_TXMEM_SIZE
SOCKET 1 Transmit Memory Size Register
0xFE4120
S1_TX_FSR0
S1_TX_FSR (SOCKET 1 Transmit Free Memory Size Register)
0xFE4121
S1_TX_FSR1
0xFE4122
S1_TX_RD0
S1_TX_RD
(SOCKET 1 Transmit Memory Read Pointer Register)
0xFE4123
S1_TX_RD1
0xFE4124
S1_TX_WR0
S1_TX_WR
(SOCKET 1 Transmit Memory Write Pointer Register)
0xFE4125
S1_TX_WR1
0xFE4126
S1_RX_RSR0
S1_RX_RSR
(SOCKET 1 Received Data Size Register)
0xFE4127
S1_RX_RSR1
0xFE4128
S1_RX_RD0
S1_RX_RD
(SOCKET 1 Receive Memory Read Pointer Register)
0xFE4129
S1_RX_RD1
0xFE412A
S1_RX_WR0
S1_RX_WR (SOCKET 1 Receive Memory Write Pointer
Register)
0xFE412B
S1_RX_WR1
0xFE412C
S1_IMR
SOCKET 1 Interrupt Mask Register
0xFE412D
S1_FRAG0
S1_FRAG
(SOCKET 1 Fragment Field Value in IP Header Register)
0xFE412E
S1_FRAG1
0xFE412F
~
0xFE41FF
Reserved
0xFE4200
S2_MR
SOCKET 2 Mode Register
0xFE4201
S2_CR
SOCKET 2 Command Register
0xFE4202
S2_IR
SOCKET 2 Interrupt Register
W7100A Datasheet v1.2.5 78
0xFE4203
S2_SR
SOCKET 2 SOCKET Status Register
0xFE4204
S2_PORT0
S2_PORT (SOCKET 2 Source Port Register)
0xFE4205
S2_PORT1
0xFE4206
S2_DHAR0
S2_DHAR (SOCKET 2 Destination Hardware Address Register)
0xFE4207
S2_DHAR1
0xFE4208
S2_DHAR2
0xFE4209
S2_DHAR3
0xFE420A
S2_DHAR4
0xFE420B
S2_DHAR5
0xFE420C
S2_DIPR0
S2_DIPR (SOCKET 2 Destination IP Address Register)
0xFE420D
S2_DIPR1
0xFE420E
S2_DIPR2
0xFE420F
S2_DIPR3
0xFE4210
S2_DPORT0
S2_DPORT (SOCKET 2 Destination Port Register)
0xFE4211
S2_DPORT1
0xFE4212
S2_MSSR0
S2_MSSR (SOCKET 2 Maximum Segment Size Register)
0xFE4213
S2_MSSR1
0xFE4214
S2_PROTO0
S2_PROTO (SOCKET 2 Protocol of IP Header Field Register in
IP raw mode)
S2_PROTO1
0xFE4215
S2_TOS
SOCKET 2 IP Type of Service(TOS) Register
0xFE4216
S2_TTL
SOCKET 2 IP Time to Live(TTL) Register
0xFE4217
~
0xFE421D
Reserved
0xFE421E
S2_RXMEM_SIZE
SOCKET 2 Receive Memory Size Register
0xFE421F
S2_TXMEM_SIZE
SOCKET 2 Transmit Memory Size Register
0xFE4220
S2_TX_FSR0
S2_TX_FSR (SOCKET 2 Transmit Free Memory Size Register)
0xFE4221
S2_TX_FSR1
0xFE4222
S2_TX_RD0
S2_TX_RD
(SOCKET 2 Transmit Memory Read Pointer Register)
0xFE4223
S2_TX_RD1
0xFE4224
S2_TX_WR0
S2_TX_WR
(SOCKET 2 Transmit Memory Write Pointer Register)
0xFE4225
S2_TX_WR1
0xFE4226
S2_RX_RSR0
S2_RX_RSR (SOCKET 2 Received Data Size Register)
0xFE4227
S2_RX_RSR1
W7100A Datasheet v1.2.5 79
0xFE4228
S2_RX_RD0
S2_RX_RD
(SOCKET 2 Receive Memory Read Pointer Register)
0xFE4229
S2_RX_RD1
0xFE422A
S2_RX_WR0
S2_RX_WR
(SOCKET 2 Receive Memory Write Pointer Register)
0xFE422B
S2_RX_WR1
0xFE422C
S2_IMR
SOCKET 2 Interrupt Mask Register
0xFE422D
S2_FRAG0
SOCKET 2 Fragment Field Value in IP Header Register
0xFE422E
S2_FRAG1
0xFE422F
~
0xFE42FF
Reserved
0xFE4300
S3_MR
SOCKET 3 Mode Register
0xFE4301
S3_CR
SOCKET 3 Command Register
0xFE4302
S3_IR
SOCKET 3 Interrupt Register
0xFE4303
S3_SR
SOCKET 3 SOCKET Status Register
0xFE4304
S3_PORT0
S3_PORT (SOCKET 3 Source Port Register)
0xFE4305
S3_PORT1
0xFE4306
S3_DHAR0
S3_DHAR (SOCKET 3 Destination Hardware Address Register)
S3_DHAR (SOCKET 3 Destination Hardware Address Register)
0xFE4307
S3_DHAR1
0xFE4308
S3_DHAR2
0xFE4309
S3_DHAR3
0xFE430A
S3_DHAR4
0xFE430B
S3_DHAR5
0xFE430C
S3_DIPR0
S3_DIPR (SOCKET 3 Destination IP Address Register)
0xFE430D
S3_DIPR1
0xFE430E
S3_DIPR2
0xFE430F
S3_DIPR3
0xFE4310
S3_DPORT0
S3_DPORT (SOCKET 3 Destination Port Register)
0xFE4311
S3_DPORT1
0xFE4312
S3_MSSR0
S3_MSSR (SOCKET 3 Maximum Segment Size Register)
0xFE4313
S3_MSSR1
0xFE4314
S3_PROTO
SOCKET 3 Protocol of IP Header Field Register in IP raw
mode
0xFE4315
S3_TOS
SOCKET 3 IP Type of Service(TOS) Register
W7100A Datasheet v1.2.5 80
0xFE4316
S0_TTL
SOCKET 3 IP Time to Live(TTL) Register
0xFE4317
~
0xFE431D
Reserved
0xFE431E
S3_RXMEM_SIZE
SOCKET 3 Receive Memory Size Register
0xFE431F
S3_TXMEM_SIZE
SOCKET 3 Transmit Memory Size Register
0xFE4320
S3_TX_FSR0
S3_TX_FSR (SOCKET 3 Transmit Free Memory Size Register)
0xFE4321
S3_TX_FSR1
0xFE4322
S3_TX_RD0
S3_TX_RD
(SOCKET 3 Transmit Memory Read Pointer Register)
0xFE4323
S3_TX_RD1
0xFE4324
S3_TX_WR0
S3_TX_WR
(SOCKET 3 Transmit Memory Write Pointer Register)
0xFE4325
S3_TX_WR1
0xFE4326
S3_RX_RSR0
S3_RX_RSR (SOCKET 3 Received Data Size Register)
0xFE4327
S3_RX_RSR1
0xFE4328
S3_RX_RD0
S3_RX_RD
(SOCKET 3 Receive Memory Read Pointer Register)
0xFE4329
S3_RX_RD1
0xFE432A
S3_RX_WR0
S3_RX_WR
(SOCKET 3 Receive Memory Write Pointer Register)
0xFE432B
S3_RX_WR1
0xFE432C
S3_IMR
SOCKET 3 Interrupt Mask Register
0xFE432D
S3_FRAG0
SOCKET 3 Fragment Field Value in IP Header Register
0xFE432E
S3_FRAG1
0xFE432F
~
0xFE43FF
Reserved
0xFE4400
S4_MR
SOCKET 4 Mode Register
0xFE4401
S4_CR
SOCKET 4 Command Register
0xFE4402
S4_IR
SOCKET 4 Interrupt Register
0xFE4403
S4_SR
SOCKET 4 SOCKET Status Register
0xFE4404
S4_PORT0
S4_PORT (SOCKET 4 Source Port Register)
0xFE4405
S4_PORT1
0xFE4406
S4_DHAR0
S4_DHAR (SOCKET 4 Destination Hardware Address Register)
0xFE4407
S4_DHAR1
0xFE4408
S4_DHAR2
0xFE4409
S4_DHAR3
0xFE440A
S4_DHAR4
W7100A Datasheet v1.2.5 81
0xFE440B
S4_DHAR5
0xFE440C
S4_DIPR0
S4_DIPR (SOCKET 4 Destination IP Address Register)
0xFE440D
S4_DIPR1
0xFE440E
S4_DIPR2
0xFE440F
S4_DIPR3
0xFE4410
S4_DPORT0
S4_DPORT (SOCKET 4 Destination Port Register)
0xFE4411
S4_DPORT1
0xFE4412
S4_MSSR0
S4_MSSR (SOCKET 4 Maximum Segment Size Register)
0xFE4413
S4_MSSR1
0xFE4414
S4_PROTO
SOCKET 4 Protocol of IP Header Field Register in IP raw
mode
0xFE4415
S4_TOS
SOCKET 4 IP Type of Service(TOS) Register
0xFE4416
S4_TTL
SOCKET 4 IP Time to Live(TTL) Register
0xFE4417
~
0xFE441D
Reserved
0xFE441E
S4_RXMEM_SIZE
SOCKET 4 Receive Memory Size Register
0xFE441F
S4_TXMEM_SIZE
SOCKET 4 Transmit Memory Size Register
0xFE4420
S4_TX_FSR0
S4_TX_FSR (SOCKET 4 Transmit Free Memory Size Register)
0xFE4421
S4_TX_FSR1
0xFE4422
S4_TX_RD0
S4_TX_RD
(SOCKET 4 Transmit Memory Read Pointer Register)
0xFE4423
S4_TX_RD1
0xFE4424
S4_TX_WR0
S4_TX_WR
(SOCKET 4 Transmit Memory Write Pointer Register)
0xFE4425
S4_TX_WR1
0xFE4426
S4_RX_RSR0
S4_RX_RSR (SOCKET 4 Received Data Size Register)
0xFE4427
S4_RX_RSR1
0xFE4428
S4_RX_RD0
S4_RX_RD
(SOCKET 4 Receive Memory Read Pointer Register)
0xFE4429
S4_RX_RD1
0xFE442A
S4_RX_WR0
S4_RX_WR
(SOCKET 4 Receive Memory Write Pointer Register)
0xFE442B
S4_RX_WR1
0xFE442C
S4_IMR
SOCKET 4 Interrupt Mask Register
0xFE442D
S4_FRAG0
SOCKET 4 Fragment Field Value in IP Header Register
0xFE442E
S4_FRAG1
W7100A Datasheet v1.2.5 82
0xFE442F
~
0xFE44FF
Reserved
0xFE4500
S5_MR
SOCKET 5 Mode Register
0xFE4501
S5_CR
SOCKET 5 Command Register
0xFE4502
S5_IR
SOCKET 5 Interrupt Register
0xFE4503
S5_SR
SOCKET 5 SOCKET Status Register
0xFE4504
S5_PORT0
S5_PORT (SOCKET 5 Source Port Register)
0xFE4505
S5_PORT1
0xFE4506
S5_DHAR0
S5_DHAR (SOCKET 5 Destination Hardware Address Register)
0xFE4507
S5_DHAR1
0xFE4508
S5_DHAR2
0xFE4509
S5_DHAR3
0xFE450A
S5_DHAR4
0xFE450B
S5_DHAR5
0xFE450C
S5_DIPR0
S5_DIPR (SOCKET 5 Destination IP Address Register)
S5_DIPR (SOCKET 5 Destination IP Address Register)
0xFE450D
S5_DIPR1
0xFE450E
S5_DIPR2
0xFE450F
S5_DIPR3
0xFE4510
S5_DPORT0
S5_DPORT (SOCKET 5 Destination Port Register)
0xFE4511
S5_DPORT1
0xFE4512
S5_MSSR0
S5_MSSR (SOCKET 5 Maximum Segment Size Register)
0xFE4513
S5_MSSR1
0xFE4514
S5_PROTO
SOCKET 5 Protocol of IP Header Field Register in IP raw
mode
0xFE4515
S5_TOS
SOCKET 5 IP Type of Service(TOS) Register
0xFE4516
S5_TTL
SOCKET 5 IP Time to Live(TTL) Register
0xFE4517
~
0xFE451D
Reserved
0xFE451E
S5_RXMEM_SIZE
SOCKET 5 Receive Memory Size Register
0xFE451F
S5_TXMEM_SIZE
SOCKET 5 Transmit Memory Size Register
0xFE4520
S5_TX_FSR0
S5_TX_FSR (SOCKET 5 Transmit Free Memory Size Register)
0xFE4521
S5_TX_FSR1
W7100A Datasheet v1.2.5 83
0xFE4522
S5_TX_RD0
S5_TX_RD
(SOCKET 5 Transmit Memory Read Pointer Register)
0xFE4523
S5_TX_RD1
0xFE4524
S5_TX_WR0
S5_TX_WR
(SOCKET 5 Transmit Memory Write Pointer Register)
0xFE4525
S5_TX_WR1
0xFE4526
S5_RX_RSR0
S5_RX_RSR (SOCKET 5 Received Data Size Register)
0xFE4527
S5_RX_RSR1
0xFE4528
S5_RX_RD0
S5_RX_RD
(SOCKET 5 Receive Memory Read Pointer Register)
0xFE4529
S5_RX_RD1
0xFE452A
S5_RX_WR0
S5_RX_WR
(SOCKET 5 Receive Memory Write Pointer Register)
0xFE452B
S5_RX_WR1
0xFE452C
S5_IMR
SOCKET 5 Interrupt Mask Register
0xFE452D
S5_FRAG0
S5_FRAG
(SOCKET 5 Fragment Field Value in IP Header Register)
0xFE452E
S5_FRAG1
0xFE452F
~
0xFE45FF
Reserved
0xFE4600
S6_MR
SOCKET 6 Mode Register
0xFE4601
S6_CR
SOCKET 6 Command Register
0xFE4602
S6_IR
SOCKET 6 Interrupt Register
0xFE4603
S6_SR
SOCKET 6 SOCKET Status Register
0xFE4604
S6_PORT0
S6_PORT (SOCKET 6 Source Port Register)
0xFE4605
S6_PORT1
0xFE4606
S6_DHAR0
S6_DHAR (SOCKET 6 Destination Hardware Address Register)
0xFE4607
S6_DHAR1
0xFE4608
S6_DHAR2
0xFE4609
S6_DHAR3
0xFE460A
S6_DHAR4
0xFE460B
S6_DHAR5
0xFE460C
S6_DIPR0
S6_DIPR (SOCKET 6 Destination IP Address Register)
0xFE460D
S6_DIPR1
0xFE460E
S6_DIPR2
0xFE460F
S6_DIPR3
0xFE4610
S6_DPORT0
S6_DPORT (SOCKET 6 Destination Port Register)
W7100A Datasheet v1.2.5 84
0xFE4611
S6_DPORT1
0xFE4612
S6_MSSR0
S6_MSSR (SOCKET 6 Maximum Segment Size Register)
0xFE4613
S6_MSSR1
0xFE4614
S6_PROTO
SOCKET 6 Protocol of IP Header Field Register in IP raw
mode
0xFE4615
S6_TOS
SOCKET 6 IP Type of Service(TOS) Register
0xFE4616
S6_TTL
SOCKET 6 IP Time to Live(TTL) Register
0xFE4617
~
0xFE461D
Reserved
0xFE461E
S6_RXMEM_SIZE
SOCKET 6 Receive Memory Size Register
0xFE461F
S6_TXMEM_SIZE
SOCKET 6 Transmit Memory Size Register
0xFE4620
S6_TX_FSR0
S6_TX_FSR (SOCKET 6 Transmit Free Memory Size Register)
0xFE4621
S6_TX_FSR1
0xFE4622
S6_TX_RD0
S6_TX_RD
(SOCKET 6 Transmit Memory Read Pointer Register)
0xFE4623
S6_TX_RD1
0xFE4624
S6_TX_WR0
S6_TX_WR
(SOCKET 6 Transmit Memory Write Pointer Register)
0xFE4625
S6_TX_WR1
0xFE4626
S6_RX_RSR0
S6_RX_RSR (SOCKET 6 Received Data Size Register)
0xFE4627
S6_RX_RSR1
0xFE4628
S6_RX_RD0
S6_RX_RD
(SOCKET 6 Receive Memory Read Pointer Register)
0xFE4629
S6_RX_RD1
0xFE462A
S6_RX_WR0
S6_RX_WR
(SOCKET 6 Receive Memory Write Pointer Register)
0xFE462B
S6_RX_WR1
0xFE462C
S6_IMR
SOCKET 6 Interrupt Mask Register
0xFE462D
S6_FRAG0
S6_FRAG
(SOCKET 6 Fragment Field Value in IP Header Register)
0xFE462E
S6_FRAG1
0xFE462F
~
0xFE46FF
Reserved
0xFE4700
S7_MR
SOCKET 7 Mode Register
0xFE4701
S7_CR
SOCKET 7 Command Register
W7100A Datasheet v1.2.5 85
0xFE4702
S7_IR
SOCKET 7 Interrupt Register
0xFE4703
S7_SR
SOCKET 7 SOCKET Status Register
0xFE4704
S7_PORT0
S7_PORT (SOCKET 7 Source Port Register)
0xFE4705
S7_PORT1
0xFE4706
S7_DHAR0
S7_DHAR (SOCKET 7 Destination Hardware Address Register)
0xFE4707
S7_DHAR1
0xFE4708
S7_DHAR2
0xFE4709
S7_DHAR3
0xFE470A
S7_DHAR4
0xFE470B
S7_DHAR5
0xFE470C
S7_DIPR0
S7_DIPR (SOCKET 7 Destination IP Address Register)
0xFE470D
S7_DIPR1
0xFE470E
S7_DIPR2
0xFE470F
S7_DIPR3
0xFE4710
S7_DPORT0
S7_DPORT (SOCKET 7 Destination Port Register)
0xFE4711
S7_DPORT1
0xFE4712
S7_MSSR0
S7_MSSR (SOCKET 7 Maximum Segment Size Register)
0xFE4713
S7_MSSR1
0xFE4714
S0_PROTO
SOCKET 7 Protocol of IP Header Field Register in IP raw
mode
0xFE4715
S7_TOS
SOCKET 7 IP Type of Service(TOS) Register
0xFE4716
S7_TTL
SOCKET 7 IP Time to Live(TTL) Register
0xFE4717
~
0xFE471D
Reserved
0xFE471E
S7_RXMEM_SIZE
SOCKET 7 Receive Memory Size Register
0xFE471F
S7_TXMEM_SIZE
SOCKET 7 Transmit Memory Size Register
0xFE4720
S7_TX_FSR0
S7_TX_FSR (SOCKET 7 Transmit Free Memory Size Register)
0xFE4721
S7_TX_FSR1
0xFE4722
S7_TX_RD0
S7_TX_RD
(SOCKET 7 Transmit Memory Read Pointer Register)
0xFE4723
S7_TX_RD1
0xFE4724
S7_TX_WR0
S7_TX_WR
(SOCKET 7 Transmit Memory Write Pointer Register)
0xFE4725
S7_TX_WR1
0xFE4726
S7_RX_RSR0
S7_RX_RSR (SOCKET 7 Received Data Size Register)
0xFE4727
S7_RX_RSR1
W7100A Datasheet v1.2.5 86
0xFE4728
S7_RX_RD0
S7_RX_RD
(SOCKET 7 Receive Memory Read Pointer Register)
0xFE4729
S7_RX_RD1
0xFE472A
S7_RX_WR0
S7_RX_WR
(SOCKET 7 Receive Memory Write Pointer Register)
0xFE472B
S7_RX_WR1
0xFE472C
S7_IMR
SOCKET 7 Interrupt Mask Register
0xFE472D
S7_FRAG0
S7_FRAG
(SOCKET 7 Fragment Field Value in IP Header Register)
0xFE472E
S7_FRAG1
0xFE472F
~
0xFE47FF
Reserved
8.3 Register Description
8.3.1 Mode Register
MR (Mode Register) [R/W] [0xFE0000] [0x00]
This register is used for S/W reset, ping block mode and PPPoE mode.
7
6
5
4
3
2
1
0
RST
PB
PPPoE
Bit
Symbol
Description
7
RST
S/W Reset
If this bit is ‘1’, internal register will be initialized. It will be automatically
cleared after reset.
6
Reserved
Reserved
5
Reserved
Reserved
4
PB
Ping Block Mode
0 : Disable Ping block
1 : Enable Ping block
If the bit is set as ‘1’, there is no response to the ping request.
3
PPPoE
PPPoE Mode
0 : Disable PPPoE mode
1 : Enable PPPoE mode
If a user uses ADSL without router or etc, the bit should be set as ‘1’ to
connect to ADSL Server. For more detail, refer to the application note,
“How to connect ADSL”.
2
Reserved
Reserved
1
Reserved
Reserved
0
Reserved
Reserved
W7100A Datasheet v1.2.5 87
GAR (Gateway IP Address Register) [R/W] [0xFE0001 – 0xFE0004] [0x00]
This Register sets up the default gateway address.
Ex) In case of “192.168.0.1”
0xFE0001
0xFE0002
0xFE0003
0xFE0004
192 (0xC0)
168 (0xA8)
0 (0x00)
1 (0x01)
SUBR (Subnet Mask Register) [R/W] [0xFE0005 – 0xFE0008] [0x00]
This register sets up the subnet mask address.
Ex) In case of “255.255.255.0”
0xFE0005
0xFE0006
0xFE0007
0xFE0008
255 (0xFF)
255 (0xFF)
255 (0xFF)
0 (0x00)
SHAR (Source Hardware Address Register) [R/W] [0xFE0009 – 0xFE000E] [0x00]
This register sets up the Source Hardware address.
Ex) In case of “00.08.DC.01.02.03”
0xFE0009
0xFE000A
0xFE000B
0xFE000C
0xFE000D
0xFE000E
0x00
0x08
0xDC
0x01
0x02
0x03
SIPR (Source IP Address Register) [R/W] [0xFE000F – 0xFE0012] [0x00]
This register sets up the Source IP address.
Ex) In case of “192.168.0.2”
0xFE000F
0xFE0010
0xFE0011
0xFE0012
192 (0xC0)
168 (0xA8)
0 (0x00)
2 (0x02)
IR (Interrupt Register) [R] [0xFE0015] [0x00]
This register is accessed by the MCU of W7100A to determine the cause of an interrupt. As
long as any IR bit is set, the INT5(nINT5: TCPIPcore interrupt) signal is asserted low, and it
will not go high until all bits is cleared in the Interrupt Register.
7
6
5
4
3
2
1
0
CONFLICT
UNREACH
PPPoE
Reserved
Reserved
Reserved
Reserved
Reserved
Bit
Symbol
Description
7
CONFLICT
IP Conflict
When the ARP request has the same IP address as the Source IP address,
this bit is set as ‘1’. It can be cleared to ‘0’ by writing ‘1’ to this bit.
6
UNREACH
Destination unreachable
W7100A will receive ICMP(Destination Unreachable) packet if non-existing
W7100A Datasheet v1.2.5 88
destination IP address is transmitted during a UDP data transmission. The
UNREACH bit will be set as ‘1’. This bit can be cleared to ‘0’ by writing ‘1’
to this bit.
5
PPPoE
PPPoE Connection Close
In the PPPoE Mode, ‘1’ is set if the PPPoE connection is closed. This bit can
be cleared to ‘0’ by writing ‘1’ to this bit.
4
Reserved
Reserved
3
Reserved
Reserved
2
Reserved
Reserved
1
Reserved
Reserved
0
Reserved
Reserved
IMR (Interrupt Mask Register) [R/W] [0xFE0016] [0x00]
The Interrupt Mask Register is used for masking interrupts. Each interrupt mask bit
corresponds to a bit in the Interrupt Register2 (IR2). If an interrupt mask bit is set, an
interrupt will be issued whenever the corresponding bit in the IR2 is set. If the bit of IMR is
set as ‘0’, corresponding interrupt will not be triggered by the enabled bit in the IR2.
7
6
5
4
3
2
1
0
S7_INT
S6_INT
S5_INT
S4_INT
S3_INT
S2_INT
S1_INT
S0_INT
Bit
Symbol
Description
7
S7_INT
IR(S7_INT) Interrupt Mask
6
S6_INT
IR(S6_INT) Interrupt Mask
5
S5_INT
IR(S5_INT) Interrupt Mask
4
S4_INT
IR(S4_INT) Interrupt Mask
3
S3_INT
IR(S3_INT) Interrupt Mask
2
S2_INT
IR(S2_INT) Interrupt Mask
1
S1_INT
IR(S1_INT) Interrupt Mask
0
S0_INT
IR(S0_INT) Interrupt Mask
RTR (Retry Time-period Register) [R/W] [0xFE0017 – 0xFE0018] [0x07D0]
This register sets the period of timeout. Value 1 means 100us. The default timeout is 200ms
which has a value of 2000 (0x07D0).
Ex) For 400ms configuration, set as 4000(0x0FA0)
0xFE0017
0xFE0018
0x0F
0xA0
Re-transmission will occur if there is no response or response is delayed from the remote
W7100A Datasheet v1.2.5 89
peer.
RCR (Retry Count Register) [R/W] [0xFE0019] [0x08]
This register sets the number of re-transmission. If retransmission occurs more than the
number of retries recorded in RCR, a Timeout Interrupt will occur. (TIMEOUT bit of SOCKET n
Interrupt Register (Sn_IR) is set as ‘1’)
In TCP communication, the value of Sn_SR is changed to ‘SOCK_CLOSED’ at the same time
with Sn_IR(TIMEOUT) = ‘1’. Not in TCP communication, only Sn_IR(TIMEOUT) = ‘1’.
The timeout of W7100A can be configurable with RTR and RCR. W7100A’s timeout has ARP
and TCP retransmission timeout.
At the ARP(Refer to RFC 826, http://www.ietf.org/rfc.html) retransmission timeout,
W7100A automatically sends ARP-request to the peer’s IP address in order to acquire MAC
address information (used for communication of IP, UDP, or TCP). As waiting for ARP-response
from the peer, if there is no response during the time set in RTR, timeout occurs and ARP-
request is re-transmitted. It is repeated as many as ‘RCR + 1’ times.
Even after ARP-request retransmissions are repeated ‘RCR + 1’ times, if there is no ARP-
response, the final timeout occurs and Sn_IR(TIMEOUT) becomes ‘1’.
The value of final timeout (ARPTO) of ARP-request is as below.
During the TCP packet retransmission timeout, W7100A transmits TCP packets (SYN, FIN, RST,
DATA packets) and waits for the acknowledgement (ACK) during the time set in RTR and RCR.
If there is no ACK from the peer, timeout occurs and TCP packets (sent earlier) are
retransmitted. The retransmissions are repeated as many as ‘RCR + 1’ times. Even after TCP
packet retransmissions are repeated ‘RCR +1’ times, if there is no ACK from the peer, final
timeout occurs and Sn_SSR is changed to ‘SOCK_CLOSED” at the same time with
Sn_IR(TIMEOUT) = ‘1’
The value of final timeout (TCPTO) of TCP packet retransmission can be calculated as below,
Ex) When RTR = 2000(0x07D0), RCR = 8(0x0008),
ARPTO = 2000 X 0.1ms X 9 = 1800ms = 1.8s
ARPTO = ( RTR X 0.1ms ) X ( RCR + 1 )
M
TCPTO = ( Σ(RTR X 2N ) + ((RCR-M) X RTRMAX) ) X 0.1ms
N=0
N : Retransmission count, 0 <= N <= M
M : Minimum value when RTR X 2(M+1) > 65535 and 0 <= M <= RCR
RTRMAX : RTR X 2M
W7100A Datasheet v1.2.5 90
TCPTO = (0x07D0 + 0x0FA0 + 0x1F40 + 0x3E80 + 0x7D00 + 0xFA00 + 0xFA00 + 0xFA00 + 0xFA00) X 0.1ms
= (2000 + 4000 + 8000 + 16000 + 32000 + ((8 - 4) X 64000)) X 0.1ms
= 318000 X 0.1ms = 31.8s
PATR (Authentication Type in PPPoE mode) [R] [0xFE001C-0xFE001D] [0x0000]
This register notifies the type of authentication used to establish the PPPoE connection.
W7100A supports two types of Authentication method - PAP and CHAP.
Value
Authentication Type
0xC023
PAP
0xC223
CHAP
PPPALGO (Authentication Algorithm in PPPoE mode)[R][0xFE001E][0x00]
This register notifies the authentication algorithm used for the PPPoE connection. For detail
information, please refer to PPPoE application note.
PTIMER (PPP Link Control Protocol Request Timer Register) [R/W] [0xFE0028] [0x28]
This register indicates the duration of LCP Echo Request being sent. Value 1 is about 25ms.
Ex) in case that PTIMER is 200,
200 * 25(ms) = 5000(ms) = 5 seconds
PMAGIC (PPP Link Control Protocol Magic number Register) [R/W] [0xFE0029][0x00]
This register is used in the Magic number option during LCP negotiation. Refer to the
application note of W5100, “How to connect ADSL”.
VERSIONR (W7100A Chip Version Register)[R][0xFE001F][0x02]
This register is W7100A chip version register.
INTLEVEL (Interrupt Low Level Timer Register)[R/W][0xFE0030 – 0xFE0031][0x0000]
The INTLEVEL register sets the Interrupt Assert wait time(IAWT). It configures internal INT5
signal Low Assert waiting time until next interrupt. If user wants to use TCP/IP Core interrupt,
INTLEVEL register must be set higher than 0x2B00. Or the TCP/IP Core interrupt can be
ignored.
IAWT = (INTLEVEL0 + 1) * PLL_CLK (when INTLEVEL0 > 0)
W7100A Datasheet v1.2.5 91
PLL_CLK
IR2
S0_IR
S1_IR
0x0000 0x0001 0x0002
0x04 0x00
0x01
0x00
0x00
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
0x0003
INT5
a.
b.
c. d.
IAWT
a. At the socket 0, assume an interrupt occurs (S0_IR(3) = ‘1’) and corresponding IR2 bit is
set as ‘1’ (IR(S0_IR) = ‘1’). Then the internal INT5 signal is asserted low.
b. Also assume an interrupt continually occurs (S1_IR(0) = ‘1’) on the socket1 and
corresponding IR bit set as ‘1’ (IR(S1_IR) = ‘1’).
c. When the Host clears S0_IR(S0_IR = 0x00), the corresponding IR2 bit is also cleared
(IR(S0_IR) = ‘0’). Internal INT5 signal will be de-asserted high(deactivated) from
low(activaed).
d. When the S1_IR is cleared, but the corresponding IR2 is not 0x00 because of socket1
interrupt, internal INT5 signal should be asserted low.
However, as INTLEVEL is 0x000F, the internal INT5 signal is asserted after the IAWT(16
PLL_CLK) time.
IR2 (W7100A SOCKET Interrupt Register)[R/W][0xFE0034][0x00]
IR2 is a Register which notifies the host that a W7100A SOCKET interrupt has occurred. When
an interrupt occurs, the related bit in IR2 is enabled. In this case, the INT5 (nINT5: TCPIPcore
interrupt) signal is asserted low until all of the bits of IR2 is ‘0’. Once the IR2 register is
cleared out by using the Sn_IR bits, the INT5 signal is asserted high.
7
6
5
4
3
2
1
0
S7_INT
S6_INT
S5_INT
S4_INT
S3_INT
S2_INT
S1_INT
S0_INT
Bit
Symbol
Description
7
S7_INT
Occurrence of SOCKET 7 Interrupt
When an interrupt occurs at SOCKET 7, it becomes ‘1’. This interrupt
information is applied to S7_IR. This bit is automatically cleared when
S7_IR is cleared to 0x00 by host.
6
S6_INT
Occurrence of SOCKET 6 Interrupt
When an interrupt occurs at SOCKET 6, it becomes ‘1’. This interrupt
W7100A Datasheet v1.2.5 92
information is applied to S6_IR. This bit is automatically cleared when
S6_IR is cleared to 0x00 by host.
5
S5_INT
Occurrence of SOCKET 5 Interrupt
When an interrupt occurs at SOCKET 5, it becomes ‘1’. This interrupt
information is applied to S5_IR. This bit is automatically cleared when
S5_IR is cleared to 0x00 by host.
4
S4_INT
Occurrence of SOCKET 4 Interrupt
When an interrupt occurs at SOCKET 4, it becomes ‘1’. This interrupt
information is applied to S4_IR. This bit is automatically cleared when
S4_IR is cleared to 0x00 by host.
3
S3_INT
Occurrence of SOCKET 3 Interrupt
When an interrupt occurs at SOCKET 3, it becomes ‘1’. This interrupt
information is applied to S3_IR. This bit is automatically cleared when
S3_IR is cleared to 0x00 by host.
2
S2_INT
Occurrence of SOCKET 2 Interrupt
When an interrupt occurs at SOCKET 2, it becomes ‘1’. This interrupt
information is applied to S2_IR. This bit is automatically cleared when
S2_IR is cleared to 0x00 by host.
1
S1_INT
Occurrence of SOCKET 1 Interrupt
When an interrupt occurs at SOCKET 1, it becomes ‘1’. This interrupt
information is applied to S1_IR. This bit is automatically cleared when
S1_IR is cleared to 0x00 by host.
0
S0_INT
Occurrence of SOCKET 0 Interrupt
When an interrupt occurs at SOCKET 0, it becomes ‘0’. This interrupt
information is applied to S0_IR. This bit is automatically cleared when
S0_IR is cleared to 0x00 by host.
8.3.2 SOCKET Registers
Sn_MR (SOCKET n Mode Register)[R/W][0xFE4000 + 0x100n][0x0000]
This register configures the protocol type or option of SOCKET n.
7
6
5
4
3
2
1
0
MULTI
ND / MC
P3
P2
P1
P0
Bit
Symbol
Description
7
MULTI
Multicasting
0 : disable Multicasting
1 : enable Multicasting
W7100A Datasheet v1.2.5 93
This only applies to UDP case(P3-P0 : “0010”)
To use multicasting, write multicast group address and port number to
SOCKET n destination IP and port register respectively before using the
OPEN command.
6
MF
MAC Filter
0: disable MAC filtering
1: enable MAC filtering
Filters the MAC addresses except own MAC and broadcasting MAC address.
5
ND/MC
Use No Delayed ACK
0 : Disable No Delayed ACK option
1 : Enable No Delayed ACK option,
This only applies to TCP case (P3-P0 : “0001”)
If this bit is set as ‘1’, ACK packet is immediately transmitted after
receiving data packet from a peer. If this bit is cleared, ACK packet is
transmitted according to internal timeout mechanism.
Multicast
0 : using IGMP version 2
1 : using IGMP version 1
This bit is valid when MULTI bit is enabled and UDP mode is used (P3-P0 :
“0010”).
In addition, multicast can be used to send out the version number in IGMP
messages such as Join/Leave/Report to multicast-group
4
Reserved
Reserved
3
P3
Protocol
Sets up corresponding SOCKET as TCP, UDP, or IP RAW mode
Symbol
P3
P2
P1
P0
Meaning
Sn_MR_CLOSE
0
0
0
0
Closed
Sn_MR_TCP
0
0
0
1
TCP
Sn_MR_UDP
0
0
1
0
UDP
Sn_MR_IPRAW
0
0
1
1
IPRAW
S0_MR_MACRAW
0
1
0
0
MAC RAW
S0_MR_PPPoE
0
1
0
1
PPPoE
S0_MR_MACRAW and S0_MR_PPPoE are valid only in SOCKET 0.
S0_MR_PPPoE is temporarily used for PPPoE server connection/Termination.
After connection is established, it can be utilized as another protocol.
2
P2
1
P1
0
P0
W7100A Datasheet v1.2.5 94
Sn_CR (SOCKET n Command Register)[R/W][0xFE4001 + 0x100n][0x00]
This is used to set the command for SOCKET n such as OPEN, CLOSE, CONNECT, LISTEN, SEND,
and RECEIVE. After W7100A identifies the command, the Sn_CR register is automatically
cleared to 0x00. Even though Sn_CR is cleared to 0x00, the command is still being processed.
To verify whether the command is completed or not, please check the Sn_IR or Sn_SR
registers.
Value
Symbol
Description
0x01
OPEN
SOCKET n is initialized and opened according to the protocol selected in
Sn_MR (P3:P0). The table below shows the value of Sn_SR corresponding
to Sn_MR
Sn_MR(P3:P0)
Sn_SR
Sn_MR_CLOSE(0x00)
-
Sn_MR_TCP(0x01)
SOCK_INIT(0x13)
Sn_MR_UDP(0x02)
SOCK_UDP(0x22)
Sn_MR_IPRAW(0x03)
SOCK_IPRAW(0x32)
S0_MR_MACRAW(0x04)
SOCK_MACRAW(0x42)
S0_MR_PPPoE(0x05)
SOCK_PPPoE(0x5F)
0x02
LISTEN
This is valid only in TCP mode (Sn_MR(P3:P0) = Sn_MR_TCP).
In this mode, the SOCKET n is configured as a TCP server which is
waiting for connection-request (SYN packet) from any “TCP CLIENT”.
The Sn_SR register changes the state from SOCK_INIT to
SOCKET_LISTEN.
When a client’s connection request is successfully established, the
Sn_SR changes from SOCK_LISTEN to SOCK_ESTABLIESHED and the
Sn_IR(0) becomes ‘1’. On the other hand, Sn_IR(3) is set as ‘1’ and
Sn_SR changes to SOCK_CLOSED during a connection failure(SYN/ACK
packet failed to transfer)
cf> If the destination port of the TCP Client does not exist during a
connection request, W7100A will transmit a RST packet and Sn_SR is
unchanged.
0x04
CONNECT
This mode is only valid in TCP mode and operates the SOCKET n as a
TCP client.
A connect-request (SYN packet) is sent to the TCP server by connecting
to the IP address and port stored in destination address and port
registers (Sn_DIPR0 and Sn_DPORT0)
When a client’s connection request is successfully established, the
W7100A Datasheet v1.2.5 95
Sn_SR register is changed to SOCK_ESTABLIESHED and the Sn_IR(0)
becomes ‘1’.
In the following cases, the connect-request fails
- When a ARP timeout occurs (Sn_IR(s)=‘1’) because the
Destination Hardware Address is not acquired through the ARP
process
- When a SYN/ACK packet is not received and TCP timeout
(Sn_IR(3)) is’1’
- When a RST packet is received instead of a SYN/ACK packet
Above three cases, Sn_SR is changed to SOCK_CLOSED.
0x08
DISCON
Only valid in TCP mode
Regardless of “TCP SERVER” or “TCP CLIENT”, this disconnect the
process
- Active close : it transmits disconnect-request(FIN packet) to
the connected peer
- Passive close : When FIN packet is received from peer, a FIN
packet is replied back to the peer
when FIN/ACK packet is received, Sn_SR is changed to SOCK_CLOSED.
When a disconnect request is not received, TCPTO occurs (Sn_IR(3)=’1’)
and Sn_SR is changed to SOCK_CLOSED.
cf> If CLOSE is used instead of DISCON, only Sn_SR is changed to
SOCK_CLOSED without disconnect-process(disconnect-request). If a RST
packet is received from a peer during communication, Sn_SR is
unconditionally changed to SOCK_CLOSED.
0x10
CLOSE
Closes SOCKET n.
Sn_SR is changed to SOCK_CLOSED.
0x20
SEND
SEND command transmits remained (not transmitted) data buffered in
the TX memory. For more details, please refer to SOCKET n TX Free Size
Register (Sn_TX_FSR), SOCKET n TX Write Pointer Register(Sn_TX_WR),
and SOCKET n TX Read Pointer Register(Sn_TX_RD).
0x21
SEND_MAC
Used in UDP mode only
The basic operation is same as SEND. Normally SEND operation needs
Destination Hardware Address which can be retrieved by the ARP
(Address Resolution Protocol) process. SEND_MAC uses SOCKET n
Destination Hardware Address(Sn_DHAR) that is chosen by the user
without going through the ARP process.
0x22
SEND_KEEP
Used in TCP mode
W7100A Datasheet v1.2.5 96
It checks the connection status by sending the keep alive packet. If the
connection has no response from peers or is terminated, the Timeout
interrupt will occur.
0x40
RECV
RECV processes the data received by using a RX read pointer
register(Sn_RX_RD).
For more detail, please refer to 9.2.1.1 SERVER mode Receiving Process
with SOCKET n RX Received Size Register (Sn_RX_RSR), SOCKET n RX
Write Pointer Register(Sn_RX_WR), and SOCKET n RX Read Pointer
Register(Sn_RX_RD).
Below commands are only valid for SOCKET 0 and S0_MR(P3:P0) = S0_MR_PPPoE.
For more detail refer to the W5100 application note “How to use ADSL”.
Value
Symbol
Description
0x23
PCON
ADSL connection begins by transmitting PPPoE Discovery Packet
0x24
PDISCON
Closes ADSL connection
0x25
PCR
In each phase, it transmits REQ message
0x26
PCN
In each phase, it transmits NAK message
0x27
PCJ
In each phase, it transmits REJECT message
Sn_IR (SOCKET n Interrupt Register)[R/W][0xFE4002 + 0x100n][0x00]
Sn_IR register provides information such as the type of interrupt (establishment,
termination, receiving data, timeout) used in SOCKET n. When an interrupt occurs and the
mask bit of Sn_IMR is ‘1’, the interrupt bit of Sn_IR becomes ‘1’.
In order to clear the Sn_IR bit, the host should write the bit as ‘1’. When all the bits of
Sn_IR is cleared (‘0’), IR(n) is automatically cleared. It occurs the INT5 signal (nINT5:
TCPIPCore interrupt) to MCU.
7
6
5
4
3
2
1
0
PRECV
PFAIL
PNEXT
SEND_OK
TIMEOUT
RECV
DISCON
CON
Bit
Symbol
Description
7
PRECV
PPP Receive Interrupt, when the option which is not supported is
received
6
PFAIL
PPP Fail Interrupt, when PAP Authentication is failed
5
PNEXT
PPP Next Phase Interrupt, when the phase is changed during ADSL
connection process
4
SENDOK
SEND OK Interrupt, when the SEND command is completed
W7100A Datasheet v1.2.5 97
3
TIMEOUT
TIMEOUT Interrupt, when ARP timeout or TCP timeout occurs
2
RECV
Receive Interrupt, whenever data packet is received from a peer
1
DISCON
Disconnect Interrupt, when FIN of FIN/ACK packet is received from a
peer
0
CON
Connect Interrupt occurs only one time when changing the SOCKET
status to SOCK_Established
Sn_IMR (SOCKET n Interrupt Mask Register)[R/W][0xFE402C + 0x100n][0xFF]
It configures the interrupt of SOCKET n so as to notify to the host. Interrupt mask bit of
Sn_IMR corresponds to interrupt bit of Sn_IR. If interrupt occurs in any SOCKET and the bit is
set as ‘1’, its corresponding bit of Sn_IR is set as ‘1’. When the bits of Sn_IMR and Sn_IR are
‘1’, IR(n) becomes ‘1’. At this time, if IMR(n) is ‘1’, the interrupt is issued to the host. (‘/INT’
signal is asserted low)
7
6
5
4
3
2
1
0
PRECV
PFAIL
PNEXT
SEND_OK
TIMEOUT
RECV
DISCON
CON
Bit
Symbol
Description
7
PRECV
Sn_IR(PRECV) Interrupt Mask
Valid only in case of ‘SOCKET = 0’ & ‘S0_MR(P3:P0) = S0_MR_PPPoE’
6
PFAIL
Sn_IR(PFAIL) Interrupt Mask
Valid only in case of ‘SOCKET = 0’ & ‘S0_MR(P3:P0) = S0_MR_PPPoE’
5
PNEXT
Sn_IR(PNEXT) Interrupt Mask
Valid only in case of ‘SOCKET = 0’ & ‘S0_MR(P3:P0) = S0_MR_PPPoE’
4
SENDOK
Sn_IR(SENDOK) Interrupt Mask
3
TIMEOUT
Sn_IR(TIMEOUT) Interrupt Mask
2
RECV
Sn_IR(RECV) Interrupt Mask
1
DISCON
Sn_IR(DISCON) Interrupt Mask
0
CON
Sn_IR(CON) Interrupt Mask
Sn_SR (SOCKET n Status Register)[R][0xFE4003 + 0x100n][0x00]
This register provides the status of SOCKET n. SOCKET status are changed when using the
Sn_CR register or during packet transmission/reception.
The table below describes the different states of SOCKET n
Value
Symbol
Description
0x00
SOCK_CLOSED
When DISCON or CLOSE command is used, or ARPTO, or TCPTO
occurs, the state changes to SOCK_CLOSED regardless of
previous value.
W7100A Datasheet v1.2.5 98
0x13
SOCK_INIT
In this state, the SOCKET n is opened in TCP mode and
initialized the first step of TCP connection establishment.
Now, the user can use the LISTEN and CONNECT commands.
When Sn_MR(P3:P0) is Sn_MR_TCP and the OPEN command is
used, the stage changes to SOCK_INIT.
0x14
SOCK_LISTEN
SOCKET n operates in TCP Server Mode and waits for a
connection-request (SYN packet) from a “TCP CLIENT”.
When the LISTEN command is used, the stage changes to
SOCK_LISTEN
Once the connection is established, the SOCKET state
changes from SOCK_LISTEN to SOCK_ESTABLISHED;however,
if the connection fails, TCPTO occurs (Sn_IR(TIME_OUT) = ‘1’)
and the state changes to SOCK_CLOSED.
0x17
SOCK_ESTABLISHED
When a SYN packet is received from a TCP client, the socket
changes from the SOCK_LISTEN or CONNECTS state to the
SOCK_ESTABLISHED state. At this stage, DATA packets can be
exchanged by using the SEND or RECV command.
0x1C
SOCK_CLOSE_WAIT
In this case, a disconnect-request (FIN packet) is received
from a peer. Although the TCP connection is half-closed,
data packet can still be transferred. In order to complete
the TCP disconnection, the DISCON command should be
used. When a socket is closed without going through the
disconnection-process, the CLOSE command should be used.
0x22
SOCK_UDP
The socket is opened in UDP mode. The SOCKET status is
changed to SOCK_UDP when Sn_MR(P3:P0) is Sn_MR_UDP
and OPEN command is used. Unlike TCP mode, the SOCKET
in UDP mode can transfer data without establishing a
connection (3 way handshake)
0x32
SOCK_IPRAW
The socket is opened in IPRAW mode. The SOCKET status is
change to SOCK_IPRAW when Sn_MR(P3:P0) is Sn_MR_IPRAW
and OPEN command is used. IP Packet can be transferred
without a connection similar to the UDP mode.
0x42
SOCK_MACRAW
SOCKET0 is opened in MACRAW mode. The SOCKET status is
change to SOCK_MACRAW when S0_IMR(P3:P0) is
S0_MR_MACRAW and S0_CR = OPEN. MAC packet(Ethernet
frame) can be transferred similar to UDP mode.
0x5F
SOCK_PPPOE
SOCKET 0 is opened in PPPoE mode. The SOCKET status is
W7100A Datasheet v1.2.5 99
changed to SOCK_PPPoE when S0_MR(P3:P0) = S0_MR_PPPoE
and S0_CR = OPEN.
Below table shows the temporary status which can be observed when changing the Sn_SR.
Value
Symbol
Description
0x15
SOCK_SYNSENT
This status indicates that a connect-request(SYN packet) is
sent to a "TCP SERVER".
SYNSENT is an intermediate state between SOCK_INT and
SOCK_ESTABLISHED. If connect-accept(SYN/ACK packet) is
received from a "TCP SERVER", the SOCKET status
automatically changes to SOCK_ESTBLISHED. However, if
SYN/ACK packet is not received before TCP timeout occurs
(Sn_IR(TIMEOUT)=‘1’), the status is changed to
SOCK_CLOSED.
0x16
SOCK_SYNRECV
This status indicate that a connect-request(SYN packet) is
received from a "TCP CLIENT".
The socket status changes to SOCK_ESTABLISHED when
W7100A successfully transmits connect-accept (SYN/ACK
packet) to a "TCP CLIENT". If W7100A fails to send and TCPTO
occurs (Sn_IR(TIMEOUT)=‘1’), the status is changed to
SOCK_CLOSED.
0x18
SOCK_FIN_WAIT
These statues show the process of terminating a connection.
If the termination succeeds or Timeout interrupt is asserted,
the socket status is changed to SOCK_CLOSED.
0x1A
SOCK_CLOSING
0X1B
SOCK_TIME_WAIT
0X1D
SOCK_LAST_ACK
0x01
SOCK_ARP
This status indicates an ARP-request is being transmitted to
a peer in order to acquire destination hardware address.
It appears when the SEND command is used in UDP, IP RAW,
and TCP mode, the socket status changes to SOCK_ARP.
If the hardware address is successfully acquired from the
destination (ARP-response is received), the socket status
changes to SOCK_UDP, SOCK_IPRAW or SOCK_SYNSENT.
On the other hand, when W7100A fails to acquire the
hardware address and an ARP timeout occurs
(Sn_IR(TIMEOUT)= ‘1’), the socket status returns to the
previous state in UDP mode and IP RAW mode. In TCP mode,
the socket status goes to the SOCK_CLOSED state.
W7100A Datasheet v1.2.5 100
cf> In UDP and IP RAW mode, the Sn_DIPR register compares
the previous and current values. ARP is only used if the two
values are different.
Figure 8.2 SOCKET n Status transition
Sn_PORT (SOCKET n Source Port Register)[R/W][(0xFE4004 + 0x100n) – (0xFE4005 +
0x100n)][0x0000]
It sets source port number.
It is valid when SOCKET n is used as TCP or UDP mode, and ignored when used as other
modes.
It should be set before OPEN command.
Ex) In case of SOCKET 0 port = 5000(0x1388), configure as below,
W7100A Datasheet v1.2.5 101
0xFE4004
0xFE4005
0x13
0x88
Sn_DHAR (SOCKET n Destination Hardware Address Register)[R/W][(0xFE4006 + 0x100n)
– (0xFE400B + 0x100n)][FF.FF.FF.FF.FF.FF]
It sets or is set as destination hardware address of SOCKET n. Also, if SOCKET 0 is used for
PPPoE mode, S0_DHAR sets as PPPoE server hardware an address that is already known.
When using SEND_MAC command at the UDP or IPRAW mode, it sets the destination
hardware address of SOCKET n. At the TCP, UDP and IPRAW mode, Sn_DHAR is set as
destination hardware address that is acquired by ARP-process of CONNECT or SEND command.
The host can acquire the destination hardware address through Sn_DHAR after successfully
performing CONNET or SEND command.
When using PPPoE-process of W7100A, PPPoE server hardware address is not required to be
set.
However, even if PPPoE-process of W7100A is not used, but implemented by yourself with
MACRAW mode, in order to transmit or receive the PPPoE packet, PPPoE server hardware
address(acquired by your PPPoE-process), PPPoE server IP address, and PPP session ID should
be set, and MR(PPPoE) also should be set as '1'.
S0_DHAR sets the PPPoE server hardware address before the OPEN command. PPPoE server
hardware address which is set by S0_DHAR is applied to PDHAR after performing the OPEN
command. The configured PPPoE information is internally valid even after the CLOSE
command.
EX) In case of SOCKET 0 Destination Hardware address = 00.08.DC.01.02.10, config
uration is as below,
0xFE4006
0xFE4007
0xFE4008
0xFE4009
0xFE400A
0xFE400B
0x00
0x08
0xDC
0x01
0x02
0x10
Sn_DIPR (SOCKET n Destination IP Address Register)[R/W][(0xFE400C + 0x100n) –
(0xFE400F + 0x100n)][00.00.00.00]
It sets or is set as destination IP address of SOCKET n. If SOCKET 0 is used as PPPoE mode,
S0_DIPR0 sets PPPoE server with an IP address that is already known.
It is valid only in TCP, UDP, IPRAW or PPPoE mode, but ignored in MACRAW mode.
In the TCP mode, when operating as "TCP CLIENT" it sets the IP address of the "TCP SERVER"
before performing the CONNECT command and when operating as "TCP SERVER", it internally
sets the IP address of the "TCP CLIENT" after successfully establishing connection.
In UDP or IPRAW mode, set the destination IP address in the Sn_DIPR for transmitting UDP or
IPRAW DATA packets before performing SEND or SEND_MAC command. At the PPPoE mode,
S0_DIPR sets as PPPoE server IP address that is already known.
W7100A Datasheet v1.2.5 102
Ex) In case of SOCKET 0 Destination IP address = 192.168.0.11, configure as below,
0xFE400C
0xFE400D
0xFE400E
0xFE400F
192 (0xC0)
168 (0xA8)
0 (0x00)
11 (0x0B)
Sn_DPORT (SOCKET n Destination Port Register)[R/W][(0xFE4010 + 0x100n) – (0xFE4011
+ 0x100n)][0x0000]
The destination port number is set in the Sn_DPORT of SOCKET n. If SOCKET 0 is used as
PPPoE mode, S0_DPORT0 sets PPP session ID that is already known.
It is valid only in TCP, UDP or PPPoE mode, and ignored in other modes.
At the TCP mode, when operating as "TCP CLIENT", it listens for the port number of the "TCP
SERVER" before performing the CONNECT command.
At the UDP mode, the destination port number is set in the Sn_DPORT to be used for
transmitting UDP DATA packets before performing SEND or SEND_MAC command.
At the PPPoE mode, the PPP session ID that is already known is set in the S0_DPORT. PPP
session ID (set by S0_DPORT0) is applied to PSIDR after performing the OPEN command.
Ex) In case of SOCKET 0 Destination Port = 5000(0x1388), configure as below,
0xFE4010
0xFE4011
0x13
0x88
Sn_MSSR (SOCKET n Maximum Segment Size Register)[R/W][(0xFE4012 + 0x100n) –
(0xFE4013 + 0x100n)][0x0000]
It sets the MTU (Maximum Transfer Unit) of SOCKET n or notifies the MTU that is already set.
It supports TCP or UDP mode. When using PPPoE (MR(PPPoE)=‘1’), the MTU of the TCP or UDP
mode is assigned in the range of the MTU of PPPoE.
At the IPRAW or MACRAW, MTU is not processed internally, but the default MTU is used.
Therefore, when transmitting data bigger than the default MTU, the host should manually
divide the data into the default MTU unit.
Reset value is 0 in the SOCKET initialization process, but the MSSR is changed to the smaller
value between the user setting value and default value. If there is no user setting value, MSSR
is changed to default value.
At the TCP or UDP mode, if transmitting data is bigger than the MTU, W7100A automatically
divides the data into the MTU unit.
MTU is known as MSS in the TCP mode. By selecting from the Host-Written-Value and the
peer's MSS, MSS is automatically set as the smaller value through the TCP connection process.
At the UDP mode, there is no connection-process of TCP mode, and Host-Written-Value is
just used. When communicating with the peer having a different MTU, W7100A is able to
receive ICMP (Fragment MTU) packets. So, the user should close the SOCKET, set FMTU as
W7100A Datasheet v1.2.5 103
Sn_MSSR and retry the communication with the OPEN command.
Mode
Normal (MR(PPPoE)=‘0’)
PPPoE (MR(PPPoE)=‘1’)
Default MTU
Range
Default MTU
Range
TCP
1460
1 ~ 1460
1452
1 ~ 1452
UDP
1472
1 ~ 1472
1464
1 ~ 1464
IPRAW
1480
1472
MACRAW
1514
Ex) In case of SOCKET 0 MSS = 1460(0x05B4), configure as below,
0xFE4012
0xFE4013
0x05
0xB4
Sn_PROTO (SOCKET n Protocol Number Register)[R/W][0xFE4014 + 0x100n][0x00]
It is a 1 byte register that sets the protocol number field of the IP header at the IP layer. It
is valid only in IPRAW mode, and ignored in other modes. Sn_PROTO is set before OPEN
command. When SOCKET n is opened in IPRAW mode, it transmits and receives the data of the
protocol number set in Sn_PROTO. Sn_PROTO can be assigned in the range of 0x00 ~ 0xFF, but
W7100A does not support TCP(0x06) and UDP(0x11) protocol number
Protocol number is defined in IANA(Internet assigned numbers authority). For the detail,
refer to online document (Uhttp://www.iana.org/assignments/protocol-numbersU).
Ex) Internet Control Message Protocol(ICMP) = 0x01, Internet Group Management Pr
otocol = 0x02
Sn_TOS (SOCKET n TOS Register)[R/W][0xFE4015 + 0x100n][0x00]
It sets the TOS(Type of Service) field of the IP header at the IP layer. It should be set before
the OPEN command. Refer to Uhttp://www.iana.org/assignments/ip-parametersU.
Sn_TTL (SOCKET n TTL Register)[R/W][0xFE4016 + 0x100n][0x80]
It sets the TTL(Time To Live) field of the IP header at the IP layer. It should be set before
the OPEN command. Refer to Uhttp://www.iana.org/assignments/ip-parametersU.
Sn_RXMEM_SIZE (SOCKET n Receive Memory Size Register)[R/W][0xFE401E +
0x100n][0x02]
It configures the internal RX Memory size of each SOCKET. RX Memory size of each SOCKET is
configurable in the size of 1, 2, 4, 8, 16Kbytes. 2Kbytes is assigned when reset.
Sn_RXMEM_SIZESUM(sum of Sn_RXMEM_SIZE) of each SOCKET should be 16KB.
W7100A Datasheet v1.2.5 104
Ex1) SOCKET 0 : 8KB, SOCKET 1 : 2KB
0xFE401E
0xFE411E
0x08
0x02
Ex2) SOCKET 2 : 1KB, SOCKET 3 : 1KB
0xFE421E
0xFE431E
0x01
0x01
Ex3) SOCKET 4 : 1KB, SOCKET 5 : 1KB
0xFE441E
0xFE451E
0x01
0x01
Ex4) SOCKET 6 : 1KB, SOCKET 7 : 1KB
0xFE461E
0xFE471E
0x01
0x01
As shown above ex1) ~ ex4), total size of each SOCKET’s RX memory (Sn_RXMEM_S
IZESUM) is 16Kbytes.
Sn_TXMEM_SIZE (SOCKET n Transmit Memory Size Register)[R/W][0xFE401F +
0x100n][0x02]
It configures the internal TX Memory size of each SOCKET. TX Memory size of each SOCKET is
configurable in the size of 1, 2, 4, 8, 16Kbytes. 2Kbytes is assigned when reset.
Sn_TXMEM_SIZESUM(summation of Sn_TXMEM_SIZE) of each SOCKET should be 16KB.
Ex5) SOCKET 0 : 4KB, SOCKET 1 : 1KB
0xFE401F
0xFE411F
0x04
0x01
Ex6) SOCKET 2 : 2KB, SOCKET 3 : 1KB
0xFE421F
0xFE431F
0x02
0x01
Ex7) SOCKET 4 : 2KB, SOCKET 5 : 2KB
0xFE441F
0xFE451F
0x02
0x02
W7100A Datasheet v1.2.5 105
Ex8) SOCKET 6 : 2KB, SOCKET 7 : 2KB
0xFE461F
0xFE471F
0x02
0x02
As shown above ex5) ~ ex8), total size of each SOCKET’s TX memory (Sn_TXMEM_S
IZESUM) is 16Kbytes.
Sn_TX_FSR (SOCKET n TX Free Size Register)[R][(0xFE4020 + 0x100n) – (0xFE4021 +
100n)][0x0000]
It notifies the available size of the internal TX memory (the byte size of transmittable data)
of SOCKET n. The host can’t write data as a size bigger than Sn_TX_FSR. Therefore, be sure to
check Sn_TX_FSR before transmitting data, and if your data size is smaller than or the same
as Sn_TX_FSR, transmit the data with SEND or SEND_MAC command after copying the data.
At the TCP mode, if the peer checks the transmitted DATA packet (if DATA/ACK packet is
received from the peer), Sn_TX_FSR is automatically increased by the size of that transmitted
DATA packet. At the other modes, when Sn_IR(SENDOK) is ‘1’, Sn_TX_FSR is automatically
increased by the size of the transmitted data.
Ex) In case of 2048(0x8000) in S0_TX_FSR0
0xFE4020
0xFE4021
0x08
0x00
Sn_TX_RD (SOCKET n TX Read Pointer Register)[R][(0xFE4022 + 0x100n) – (0xFE4023 +
0x100n)][0x0000]
This register shows the address of the last transmission finishing in the TX memory. With the
SEND command of SOCKET n Command Register, it transmits data from the current Sn_TX_RD
to the Sn_TX_WR and automatically updates after transmission is finished. Therefore, after
transmission is finished, Sn_TX_RD and Sn_TX_WR will have the same value. When reading this
register, the user should read the upper bytes (0xFE4022, 0xFE4122, 0xFE4222, 0xFE4322,
0xFE4422, 0xFE4522, 0xFE4622, 0xFE4722) first and lower bytes (0xFE4023, 0xFE4123,
0xFE4223, 0xFE4323, 0xFE4423, 0xFE4523, 0xFE4623, 0xFE4723) later to get the correct value.
Sn_TX_WR (SOCKET n TX Write Pointer Register)[R/W][(0xFE4024 + 0x100n) – (0xFE4025
+ 0x100n)][0x0000]
This register offers the location information of where the transmission data should be
written. When reading this register, the user should read the upper bytes (0xFE4024,
0xFE4124, 0xFE4224, 0xFE4324, 0xFE4424, 0xFE4524, 0xFE4624, 0xFE4724) first and the lower
bytes (0xFE4025, 0xFE4125, 0xFE4225, 0xFE4325, 0xFE4425, 0xFE4525, 0xFE4625, 0xFE4725)
later to get the correct value.
W7100A Datasheet v1.2.5 106
Ex) In case of 2048(0x0800) in S0_TX_WR,
0xFE4024
0xFE4025
0x08
0x00
But this value itself is not the physical address to write. So, the physical address should be
calculated as follows: (Refer to the W7100A Driver code)
1. SOCKET n TX Base Address (SBUFBASEADDRESS(n)) and SOCKETn TX Mask Address
(SMASK(n)) are calculated on Sn_TXMEM_SIZE(n) value. Refer to the Pseudo code of the
Initialization if detail is needed.
2. The bitwise-AND operation of two values and Sn_TX_WR and SMASK(n) gives the result
of the offset address (dst_mask) in TX memory range of the SOCKET.
3. Two values dst_mask and SBUFBASEADDRESS(n) are added together to give the result of
the physical address (dst_ptr).
Now, write the transmission data to dst_ptr as large as the user wants. (* There may be a
case where it exceeds the TX memory of the upper-bound of the SOCKET while writing. In this
case, write the transmission data to the upper-bound, and change the physical address to the
SBUFBASEADDRESS(n). Next, write the rest of the transmission data.)
After that, be sure to increase the Sn_TX_WR value by the size of writing data. Finally, give
the SEND command to Sn_CR (SOCKET n Command Register). Refer to the pseudo code of the
transmission part on TCP Server mode if the detail is needed.
W7100A Datasheet v1.2.5 107
Figure 8.3 Calculate Physical Address
Sn_RX_RSR (SOCKET n RX Received Size Register)[R][(0xFE4026 + 0x100n) – (0xFE4027
+ 0x100n)][0x0000]
It informs the user of the byte size of the received data in Internal RX Memory of SOCKET n.
As this value is internally calculated with the values of Sn_RX_RD and Sn_RX_WR, it is
automatically changed by RECV command of SOCKET n Command Register(Sn_CR) and
receives data from the remote peer. When reading this register, the user should read the
upper byte(0xFE4026, 0xFE4126, 0xFE4226, 0xFE4326, 0xFE4426, 0xFE4526, 0xFE4626,
W7100A Datasheet v1.2.5 108
0xFE4726) first and lower byte(0xFE4027, 0xFE4127, 0xFE4227, 0xFE4327, 0xFE4427,
0xFE4527, 0xFE4627, 0xFE4727) later to get the correct value.
Ex) In case of 2048(0x0800) in S0_RX_RSR,
0xFE4026
0xFE4027
0x08
0x00
The total size of this value can be decided according to the value of RX Memory Size Register.
Sn_RX_RD (SOCKET n Read Pointer Register)[R/W][(0xFE4028 + 0x100n) – (0xFE4029 +
0x100n)][0x0000]
This register offers the location information to read the receiving data. When reading this
register, user should read the upper byte (0xFE4028, 0xFE4128, 0xFE4228, 0xFE4328,
0xFE4428, 0xFE4528, 0xFE4628, 0xFE4728) first and lower byte (0xFE4029, 0xFE4129,
0xFE4229, 0xFE4329, 0xFE4429, 0xFE4529, 0xFE4629, 0xFE4729) later to get the correct value.
Ex) In case of 2048(0x0800) in S0_RX_RD,
0x0428
0x0429
0x08
0x00
But this value itself is not the physical address to read. So, the physical address should be
calculated as follows: (Refer to the W7100A Driver code)
1. SOCKET n RX Base Address (RBUFBASEADDRESS(n)) and SOCKET n RX Mask Address
(RMASK(n)) are calculated on Sn_RXMEM_SIZE(n) value.
2. The bitwise-AND operation of two values, Sn_RX_RD and RMASK(n) gives the result of
the offset address (src_mask), in the RX memory range of the SOCKET.
3. Two values src_mask and RBUFBASEADDRESS(n) are added together to give the result of
the physical address(src_ptr).
Now, read the receiving data from src_ptr as large as the user wants. (* There may be a case
where it exceeds the RX memory upper-bound of the SOCKET while reading. In this case, read
the receiving data to the upper-bound, and change the physical address to the
RBUFBASEADDRESS(n). Next, read the rest of the receiving data.)
After that, be sure to increase the Sn_RX_RD value by the size of the reading data. (* Must
not increase more than the size of received data. So must check Sn_RX_RSR before receiving
process.) Finally, give RECV command to Sn_CR(SOCKET n Command Register).
Refer to the pseudo code of the receiving part on TCP Server mode if the detail is needed.
Sn_RX_WR (SOCKET n RX Write Pointer Register)[R/W][(0xFE402A + 0x100n) – (0xFE402B
+ 0x100n)][0x0000]
This register offers the location information to write the receive data. When reading this
register, the user should read upper bytes (0xFE402A, 0xFE412A, 0xFE422A, 0xFE432A,
W7100A Datasheet v1.2.5 109
0xFE442A, 0xFE452A, 0xFE462A, 0xFE472A) first and lower bytes (0xFE402B, 0xFE412B,
0xFE422B, 0xFE432B, 0xFE442B, 0xFE452B, 0xFE462B, 0xFE472B) later to get the correct
value.
Ex) In case of 2048(0x0800) in S0_RX_WR,
0xFE402A
0xFE402B
0x08
0x00
Sn_FRAG (SOCKET n Fragment Register)[R/W][(0xFE402D + 0x100n) – (0xFE402E +
0x100n)][0x4000]
It sets the Fragment field of the IP header at the IP layer. W7100A does not support the
packet fragment at the IP layer. Even though Sn_FRAG is configured, IP data is not fragmented,
and not recommended either. It should be configured before performing OPEN command.
Ex) Sn_FRAG0 = 0x4000 (Don’t Fragment)
0xFE402D
0xFE402E
0x40
0x00
W7100A Datasheet v1.2.5 110
9 Functional Description
Since the W7100A internally contains the 8051 compatible MCU and TCP/IP core, it can run
standalone without other devices to Ethernet application. In this section, both the
initialization of the W7100A and the communication method for each protocol (TCP, UDP,
IPRAW and MACRAW) based on Pseudo code will be introduced.
9.1 Initialization
The initialization of W7100A has three steps which setup the 8051 MCU, the network
information and the internal TX/RX memory.
STEP 1 : Initializes MCU
1. Interrupt setting
Set the enable / disable state of interrupt such as the general 8051. Detail information
of the setting refers to the section 3 ‘Interrupt’.
2. Memory Access timing setting
The memory access timing can be set by using two registers which are CKCON (0x8E) and
WTST (0x92) registers. The CKCON (0x8E) can control the data memory access timing and
the WTST (0x92) can control the code memory access timing. Both two registers can set
their value from 0 to 7. But in the W7100A, CKCON can set the value 1~7 and WTST can
set the value 4~7 only. The other values of both registers are not used. If the user sets
the value to an unused value, the W7100A cannot run properly. Detail information can be
found in the section 2.5 ‘SFR definition’.
Ex) Setting: interrupt disabled, 2 clocks access time with data memory, 7 clocks
access time with code memory.
EA = 0; // Disable all interrupts
CKCON = 0x01; // Set data memory access time
WTST = 0x06; // Set code memory access time
3. Serial baud rate, register and interrupt setting for serial communication
1) For the serial communication, related registers of W7100A should be set.
The registers of W7100A for serial communication are TMOD, PCON and SCON as below.
① TMOD(89H): Decide the timer/counter mode for serial communication.
GATE
C/T
M1
M0
GATE
C/T
M1
M0
W7100A Datasheet v1.2.5 111
Table 9.1 Timer / Counter Mode
M1
M0
Mode
0
0
0
0
1
1
1
0
2
1
1
3
② PCON(87H): Decide the SMOD bit which is the control flag of the serial transmission
rate.
SMOD
-
-
-
-
-
-
-
Table 9.2 Baud rate
Mode
SMOD = ‘0’
SMOD = ‘1’
1, 3
A half of Overflow of the
Timer/Counter 1
Overflow of the
Timer/Counter 1
2
A quarter of the XTAL
A half of the XTAL
③ SCON(98H): For control and observe the UART.
SM0
SM1
SM2
REN
TB8
RB8
TI
RI
Table 9.3 Mode of UART
SM0
SM1
Mode
0
0
0
0
1
1
1
0
2
1
1
3
SM2: Used in Mode2, 3. Assume that this bit set to 1, if the 9th bit of received data
bit is ‘1’, receive the data. Or the bit is ‘0’ ignore the data.
REN: Receive enable bit (‘1’; Receive enable).
TB8: In the mode2, 3, 8th bit of transmitted data.
RB8: In the mode2, 3, 8th bit of received data.
TI: Transmission complete interrupt flag.
RI: Reception complete interrupt flag.
2) Interrupt state should be set when initializing the serial communication.
Since the serial communication uses interrupt, user must disable the related interrupts
when initializing the serial communication.
3) The baud rate should be set to the value which the user will use. Baud rate value for the
W7100A Datasheet v1.2.5 112
timer of W7100A refers to the section 6.6 ‘Examples of Baud Rate Setting’.
The calculation of baud rate for the timer is as below
① Calculation formula of timer1
TH1 = 256 – ((K * 88.4736MHz) / (384 * baud rate))
K = ‘1’ at SMOD = ‘0’, K = ‘2’ at SMOD = ‘1’
② Calculation formula of timer2
(RCAP2H, RCAP2L) = 65536 – (88.4736MHz / (32 * baud rate))
Ex) Using timer mode2, SMOD = 1, Clock speed = 88.4736MHz, Baud rate = 115200.
ET1= 0; // Timer1 INT disable
TMOD = 0x20; // TIMER MODE2
PCON |= 0x80; // SMOD = 1
TH1 = 0xFC; // x2 115200(SMOD = 1) at 88.4736MHz
TR1 = 1; // Start the TIMER1
SCON = 0x50; // Serial MODE1, REN = 1, TI = 0, RI = 0
ES = 0; // Serial interrupt disable
RI = 0; // Receive interrupt disable
TI = 0; // Transmit interrupt disable
4) If user uses TCPIP Core interrupt, the INTLEVEL register must be set to the value more than
0x2B00 because of internal TCPIP Core interrupt routine.
Ex) Set the INTLEVEL register to 0x2B00
IINCHIP_WRITE (INTLEVEL0, 0x2B); //write high byte of INTLEVEL TCPIPCore register
IINCHIP_WRITE (INTLEVEL0 + 1, 0x00);//write low byte of INTLEVEL TCPIPCore register
STEP 2 : Setting Network Information
1. Basic network information setting for communication:
It must be set the basic network information.
① SHAR(Source Hardware Address Register)
It is prescribed that the source hardware addresses, which is set by SHAR, use
unique hardware addresses (Ethernet MAC address) in the Ethernet MAC layer. The
IEEE manages the MAC address allocation. The manufacturer which produces the
network device allocates the MAC address to product.
Details on MAC address allocation refer to the website as below.
Uhttp://www.ieee.org/U, Uhttp://standards.ieee.org/regauth/oui/index.shtmlU
② GAR(Gateway Address Register)
③ SUBR(Subnet Mask Register)
④ SIPR(Source IP Address Register)
W7100A Datasheet v1.2.5 113
2. Set the retransmission time & count when the packet transmission fails.
To set the retransmission time, the registers should be set as below.
① RTR(Retry Time-value Register), In the RTR, ‘1’ means ‘100us’.
② RCR(Retry Count Register)
STEP 3 : Allocation Internal TX/RX Memory for SOCKET n
Total configurable maximum size of TX, RX memory is 16 Kbytes. User can freely set the
memory size to 1KB, 2KB, 4KB, 8KB and 16KB within 16Kbytes each 8 sockets. But the
sum of TX or RX memory cannot be set more than 16Kbytes. (TXmax = 16KB, RXmax = 16KB)
In case of, assign 2KB rx, tx memory per SOCKET
{
gS0_RX_BASE = 0xFE0000(Chip base address) + 0xFEC000(Internal RX buffer address); // Set
base address of RX memory for SOCKET 0
Sn_RXMEM_SIZE(ch) = (uint8 *) 2; // Assign 2K rx memory per SOCKET
gS0_RX_MASK = 2K – 1; // 0x07FF, for getting offset address within assigned SOCKET 0 RX
memory
gS1_RX_BASE = gS0_RX_BASE + (gS0_RX_MASK + 1);
gS1_RX_MASK = 2K – 1;
gS2_RX_BASE = gS1_RX_BASE + (gS1_RX_MASK + 1);
gS2_RX_MASK = 2K – 1;
gS3_RX_BASE = gS2_RX_BASE + (gS2_RX_MASK + 1);
gS3_RX_MASK = 2K – 1;
gS4_RX_BASE = gS3_RX_BASE + (gS3_RX_MASK + 1);
gS4_RX_MASK = 2K – 1;
gS5_RX_BASE = gS4_RX_BASE + (gS4_RX_MASK + 1);
gS5_RX_MASK = 2K – 1;
gS6_RX_BASE = gS5_RX_BASE + (gS5_RX_MASK + 1);
gS6_RX_MASK = 2K – 1;
gS7_RX_BASE = gS6_RX_BASE + (gS6_RX_MASK + 1);
gS7_RX_MASK = 2K – 1;
gS0_TX_BASE = 0xFE0000(Chip base address) + 0xFE8000(Internal TX buffer address); // Set
base address of TX memory for SOCKET 0
Sn_TXMEM_SIZE(ch) = (uint8 *) 2; // Assign 2K rx memory per SOCKET
gS0_TX_MASK = 2K – 1;
Same method, set gS1_TX_BASE, gS1_TX_MASK, gS2_TX_BASE, gS2_TX_MASK, gS3_TX_BASE,
gS3_TX_MASK, gS4_TX_BASE, gS4_TX_MASK, gS5_TX_BASE, gS5_TX_MASK, gS6_TX_BASE,
gS6_tx_MASK, gS7_TX_BASE, gS7_TX_MASK.
}
W7100A Datasheet v1.2.5 114
Figure 9.1 Allocation Internal TX/RX memory of SOCKET n
If the W7100A initialization process is finished, the W7100A can perform data
communication through Ethernet. From this point, the W7100A can transmit the ping-reply of
the request packet which is received from network.
W7100A Datasheet v1.2.5 115
9.2 Data Communication
After the W7100A initialization process, open the SOCKET to TCP or UDP or IPRAW or
MACRAW mode. W7100A can transmit and receive the data with others by ‘open’ the SOCKET.
The W7100A supports the independently and simultaneously usable 8 SOCKETS. In this section,
the communication method for each mode will be introduced.
9.2.1 TCP
The TCP is a connection-oriented protocol. The TCP make the connection SOCKET by using
its own IP address, port number and destination IP address, port number. Then transmits and
receives the data by using this SOCKET.
Methods of making the connection to SOCKET are “TCP SERVER” and “TCP CLIENT”. It is
divided by transmitting the connect-request (SYN packet).
The “TCP SERVER” listens to the connect-request from the “TCP CLIENT”, and makes
connection SOCKET by accepting the transmitted connect-request (Passive-open).
The “TCP CLIENT” transmits the connect-request first to “TCP SERVER” to make the
connection (Active-open).
Figure 9.2 TCP SERVER & TCP CLIENT
W7100A Datasheet v1.2.5 116
9.2.1.1 TCP SERVER
Figure 9.3 “TCP SERVER” Operation Flow
SOCKET Initialization
SOCKET initialization is required for TCP data communication. The initialization is opening
the SOCKET. The SOCKET opening process selects one SOCKET from 8 SOCKETS of the W7100A,
and sets the protocol mode (Sn_MR(P3:P0)) and Sn_PORT0 which is source port number (Listen
port number in “TCP SERVER”) in the selected SOCKET, and then executes OPEN command.
After the OPEN command, if the status of Sn_SR is changed to SOCK_INIT, the SOCKET
initialization process is completed.
The SOCKET initialization process is identically applied in “TCP SEVER” and “TCP CLIENT”.
The Initialization process of SOCKET n in TCP mode is shown below.
{
START:
Sn_MR = 0x0001; // sets TCP mode
W7100A Datasheet v1.2.5 117
Sn_PORT = source_port; // sets source port number
Sn_CR = OPEN; // sets OPEN command
/* wait until Sn_SR is changed to SOCK_INIT */
if (Sn_SR != SOCK_INIT) Sn_CR = CLOSE; goto START;
}
LISTEN
Run as “TCP SERVER” by LISTEN command.
{
/* listen SOCKET */
Sn_CR = LISTEN;
/* wait until Sn_SR is changed to SOCK_LISTEN */
if (Sn_SR != SOCK_LISTEN) Sn_CR = CLOSE; goto START;
}
ESTABLISHMENT
When the status of Sn_SR is SOCK_LISTEN, if it receives a SYN packet, the status of Sn_SR is
changed to SOCK_SYNRECV and transmits the SYN/ACK packet. After that, the SOCKET n
makes a connection. After it makes the connection of SOCKET n, it enables the data
communication. There are two methods to confirm the connection of SOCKET n.
First method :
{
if (Sn_IR(CON) == ‘1’) Sn_IR(CON) = ‘1’; goto ESTABLISHED stage;
/* In this case, if the interrupt of SOCKET n is activated, interrupt occurs. Refer to IR, IMR
Sn_IMR and Sn_IR. */
}
Second method :
{
if (Sn_SR == SOCK_ESTABLISHED) goto ESTABLISHED stage;
}
ESTABLISHMENT : Check received data
Confirm the reception of the TCP data.
First method :
{
if (Sn_IR(RECV) == ‘1’) Sn_IR(RECV) = ‘1’; goto Receiving Process stage;
W7100A Datasheet v1.2.5 118
/* In this case, if the interrupt of SOCKET n is activated, interrupt occurs. Refer to IR, IMR
Sn_IMR and Sn_IR. */
}
Second Method :
{
if (Sn_RX_RSR != 0x00000000) goto Receiving Process stage;
}
The First method: set the Sn_IR(RECV) to ‘1’ whenever you receive a DATA packet. If the
host receives the next DATA packet without setting the Sn_IR(RECV) as ‘1’ in the prior DATA
packet, it cannot recognize the Sn_IR(RECV) of the next DATA packet. This is due to the prior
Sn_IR(RECV) and next Sn_IR(RECV) being overlapped. So this method is not recommended if
the host cannot perfectly process the DATA packets of each Sn_IR(RECV).
ESTABLISHMENT : Receiving process
In this process, it processes the TCP data which was received in the Internal RX memory. At
the TCP mode, the W7100A cannot receive the data if the size of received data is larger than
the RX memory free size of SOCKET n. If the prior stated condition is happened, the W7100A
holds on to the connection (pauses), and waits until the RX memory’s free size is larger than
the size of the received data.
The wizmemcpy function, using Receive / Send process for fast memory copy, is defined in
the wizmemcpy.c file of W7100A driver. About more detailed information please refer to the
section 13 ‘Performance Improvement about W7100A’ for its performance and “W7100A Driver
Guide” for its usage. If user don’t want to use the wizmemcpy function, just use a common
memory copy function.
Since the W7100A internally has data memory and TCPIPCore internal memory, user should
classify it by address. So user must pad ‘0xFE’ to the top level address of TCPIPCore internal
memory with, or DPX0 register set to ‘0xFE’ when memory copying from TCPIPCore memory
to data memory. More detail about the wizmemcpy please refers to the ‘W7100A Driver
Guide’.
{
/* first, get the received size */
len = Sn_RX_RSR; // len is received size
/* calculate offset address */
src_mask = Sn_RX_RD & gSn_RX_MASK; // src_mask is offset address
/* calculate start address(physical address) */
src_ptr = gSn_RX_BASE + src_mask; // src_ptr is physical start address
/* if overflow SOCKET RX memory */
W7100A Datasheet v1.2.5 119
If((src_mask + len) > (gSn_RX_MASK + 1))
{
/* copy upper_size bytes of get_start_address to destination_address */
upper_size = (gSn_RX_MASK + 1) – src_mask;
wizmemcpy((0xFE0000 + src_ptr), (0x000000 + destination_address), upper_size);
/* update destination_address */
destination_address += upper_size;
/* copy left_size bytes of gSn_RX_BASE to destination_address */
left_size = len – upper_size;
wizmemcpy((0xFE0000 + src_ptr), (0x000000 + destination_address), left_size);
}
else
{
copy len bytes of src_ptr to destination_address */
wizmemcpy((0xFE0000 + src_ptr), (0x000000 + destination_address), len);
}
/* increase Sn_RX_RD as length of len */
Sn_RX_RD += len;
/* set RECV command */
Sn_CR = RECV;
}
ESTABLISHMENT : Check send data / Send process
The size of the transmit data cannot be larger than assigned internal TX memory of SOCKET
n. If the size of transmit data is larger than configured MSS, it is divided by size of MSS and
transmits.
To transmit the next data, user must check the completion of prior SEND command. An error
may occur if the SEND command executes before completion of prior SEND command. The
larger the data size, the more time to complete the SEND command. So the user should
properly divide the data to transmit.
At the send process, user must pad ‘0xFE’ to top-level address of TCPIPCore internal
memory as in the receive process.
{
/* first, get the free TX memory size */
FREESIZE:
freesize = Sn_TX_FSR;
if (freesize < len) goto FREESIZE; // len is send size
/* calculate offset address */
W7100A Datasheet v1.2.5 120
dst_mask= Sn_TX_WR & gSn_TX_MASK; // dst_mask is offset address
/* calculate start address(physical address) */
dst_ptr = gSn_TX_BASE + dst_mask; // dst_ptr is physical start address
/* if overflow SOCKET TX memory */
if ( (dst_mask + len) > (gSn_TX_MASK + 1) )
{
/* copy upper_size bytes of source_addr to dst_ptr */
upper_size = (gSn_TX_MASK + 1) – dst_mask;
wizmemcpy((0x000000 + source_addr), (0xFE0000 + dst_ptr), upper_size);
/* update source_addr*/
source_addr += upper_size;
/* copy left_size bytes of source_addr to gSn_TX_BASE */
left_size = len – upper_size;
wizmemcpy((0x000000 + source_addr), (0xFE0000 + gSn_TX_BASE), left_size);
}
else
{/* copy len bytes of source_addr to dst_ptr */
wizmemcpy((0x000000 + source_addr), (0xFE0000 + dst_ptr), len);
}
/* increase Sn_TX_WR as length of len */
Sn_TX_WR += send_size;
/* set SEND command */
Sn_CR = SEND;
}
ESTABLISHMENT : Check disconnect-request(FIN packet)
Check if the Disconnect-request(FIN packet) has been received. User can confirm the
reception of FIN packet as below.
First method :
{
if (Sn_IR(DISCON) == ‘1’) Sn_IR(DISCON)=‘1’; goto CLOSED stage;
/* In this case, if the interrupt of SOCKET n is activated, interrupt occurs. Refer to IR, IMR
Sn_IMR and Sn_IR. */
}
Second method :
{
if (Sn_SR == SOCK_CLOSE_WAIT) goto CLOSED stage;
}
W7100A Datasheet v1.2.5 121
ESTABLISHMENT : Check disconnect / disconnecting process
When the user does not need data communication with others, or receives a FIN packet,
disconnect the connection SOCKET.
{ /* set DISCON command */
Sn_CR = DISCON;
}
ESTABLISHMENT : Check closed
Confirm that the SOCKET n is disconnected or closed by DISCON or close command.
First method :
{
if (Sn_IR(DISCON) == ‘1’) goto CLOSED stage;
/* In this case, if the interrupt of SOCKET n is activated, interrupt occurs. Refer to IR, IMR
Sn_IMR and Sn_IR. */
}
Second method :
{
if (Sn_SR == SOCK_CLOSED) goto CLOSED stage;
}
ESTABLISHMENT : Timeout
The timeout can occur by Connect-request(SYN packet) or its response(SYN/ACK packet),
the DATA packet or its response(DATA/ACK packet), the Disconnect-request(FIN packet) or its
response(FIN/ACK packet) and transmission all TCP packet. If it cannot transmit the above
packets within ‘timeout’ which is configured at RTR and RCR, the TCP final timeout(TCPTO)
occurs and the state of Sn_SR is changed to SOCK_CLOSED. Confirming method of the TCPTO is
as below:
First method :
{
if (Sn_IR(TIMEOUT bit) == ‘1’) Sn_IR(TIMEOUT)=‘1’; goto CLOSED stage;
/* In this case, if the interrupt of SOCKET n is activated, interrupt occurs. Refer to IR, IMR
Sn_IMR and Sn_IR. */
}
Second method :
{
if (Sn_SR == SOCK_CLOSED) goto CLOSED stage;
}
W7100A Datasheet v1.2.5 122
SOCKET close
It can be used to close the SOCKET n, which disconnected by disconnect-process, or closed
by TCPTO or closed by host’s need without disconnect-process.
{/* clear the remained interrupts of SOCKET n*/
Sn_IR = 0x00FF;
IR(n) = ‘1’;
/* set CLOSE command */
Sn_CR = CLOSE;
}
W7100A Datasheet v1.2.5 123
9.2.1.2 TCP CLIENT
It is same as TCP server except ‘CONNECT’ state. User can refer to the “9.2.1.1 TCP
SERVER”.
Figure 9.4 “TCP CLIENT” Operation Flow
CONNECT
Transmit the connect-request(SYN packet) to “TCP SERVER”. It may occurs the timeout such
as ARPTO, TCPTO when make the “connection SOCKET” with “TCP SERVER”
{
Sn_DIPR = server_ip; /* set TCP SERVER IP address*/
Sn_DPORT = server_port; /* set TCP SERVER listen port number*/
Sn_CR = CONNECT; /* set CONNECT command */
}
W7100A Datasheet v1.2.5 124
9.2.2 UDP
The UDP is a Connection-less protocol. It communicates without “connection SOCKET”. The
TCP protocol guarantees reliable data communication, but the UDP protocol use datagram
communication which has no guarantees of data communication. Because the UDP do not use
“connection SOCKET”, it can communicate with many other devices with the known host IP
address and port number. This is a great advantage; communication with many others by using
just one SOCKET, but also it has many problems such as loss of transmitted data, unwanted
data which received from others etc. In the UDP, to avoid these problems and guarantee the
reliability, the host retransmits damaged data or ignores the unwanted data which is received
from others. The UDP protocol supports unicast, broadcast, and multicast communication. It
follows the below communication flow.
Figure 9.5 UDP Operation Flow
9.2.2.1 Unicast & Broadcast
The unicast is one method of UDP communication. It transmits data to one destination at
one time. On the other hand, the broadcast communication transmits data to all receivable
destinations by using ‘broadcast IP address (255.255.255.255)’. For example, suppose that the
user transmits data to destination A, B and C. The unicast communication transmits each
destication A, B and C at each time. At this time, the ARPTO can also occur when the user gets
the destination hardware address of destinations A, B and C. User cannot transmit data to
destinations which have ARPTO.
The broadcast communication can simultaneously transmit data to destination A, B and C at
one time by using “255.255.255.255” IP address. At this time, there is no need to get the
W7100A Datasheet v1.2.5 125
destination hardware address about destination A, B and C, and also ARPTO is not occurred.
How to make broadcast IP?
The broadcast IP address can be obtained by performing a bitwise logical OR operation
between the bit complement of the subnet mask and the host IP address.
ex> IP: 222.98.173.123, Subnet Mask: 255.255.255.0 then broadcast IP: 222.98.173.255
Description
Decimal
Binary
HOST IP
222.098.173.123
11011110.01100010.10101101.01111011
Bit Complement Subnet mask
000.000.000.255
00000000.00000000.00000000.11111111
Bitwise OR
-
-
Broadcast IP
222.098.173.255
11011110.01100010.10101101.11111111
SOCKET Initialization
For the UDP data communication, SOCKET initialization is needed. It is opening the SOCKET.
The SOCKET open process is as follows. At first choose the one SOCKET among the 8 SOCKETS
of W7100A, then set the protocol mode(Sn_MR(P3:P0)) of the chosen SOCKET and set the
source port number Sn_PORT0 for communication. Finally execute the OPEN command. After
the OPEN command, the state of Sn_SR is changed to SOCK_UDP. Then the SOCKET
initialization is complete.
{
START:
Sn_MR = 0x02; /* sets UDP mode */
Sn_PORT = source_port; /* sets source port number */
Sn_CR = OPEN; /* sets OPEN command */
/* wait until Sn_SR is changed to SOCK_UDP */
if (Sn_SR != SOCK_UDP) Sn_CR = CLOSE; goto START;
}
Check received data
Check the reception of UDP data from destination. User can also check for received data via
TCP communication. It is strongly recommended that the TCP method is used because of the
same reason ing TCP. Please refer to the “9.2.1.1 TCP SERVER”.
First method :
{
if (Sn_IR(RECV) == ‘1’) Sn_IR(RECV) = ‘1’; goto Receiving Process stage;
/* In this case, if the interrupt of SOCKET n is activated, interrupt occurs. Refer to IR, IMR
Sn_IMR and Sn_IR. */
W7100A Datasheet v1.2.5 126
}
Second Method :
{
if (Sn_RX_RSR != 0x00000000) goto Receiving Process stage;
}
Receiving process
Process the received UDP data in Internal RX memory. The structure of received UDP data is
as below.
Figure 9.6 The received UDP data format
The received UDP data consists of 8bytes PACKET-INFO, and DATA packet. The PACKET-INFO
contains transmitter’s information (IP address, Port number) and the length of DATA packet.
The UDP can receive UDP data from many others. User can classify the transmitter by
transmitter’s information of PACKET-INFO. It also receives broadcast SOCKET by using
“255.255.255.255” IP address. So the host should ignore unwanted reception by analysis of
transmitter’s information.
If the DATA size of SOCKET n is larger than Internal RX memory free size, user cannot receive
that DATA and also cannot receive fragmented DATA.
{/* first, get the received size */
len = Sn_RX_RSR; // len is received size
/* calculate offset address */
src_mask = Sn_RX_RD & gSn_RX_MASK; // src_mask is offset address
/* calculate start address(physical address) */
src_ptr = gSn_RX_BASE + src_mask; // src_ptr is physical start address
/* read head information (8 bytes) */
header_size = 8;
/* if overflow SOCKET RX memory */
if ( (src_mask + header_size) > (gSn_RX_MASK + 1) )
{/* copy upper_size bytes of src_ptr to header_addr */
upper_size = (gSn_RX_MASK + 1) – src_mask;
wizmemcpy((0xFE0000 + src_ptr), (0x000000 + header_addr), upper_size);
/* update header_addr*/
W7100A Datasheet v1.2.5 127
header_addr += upper_size;
/* copy left_size bytes of gSn_RX_BASE to header_addr */
left_size = header_size – upper_size;
wizmemcpy((0xFE0000 + gSn_RX_BASE), (0x000000 + header_addr), left_size);
/* update src_mask */
src_mask = left_size;
}
else
{/* copy header_size bytes of get_start_address to header_addr */
wizmemcpy((0xFE0000 + src_ptr), (0x000000 + header_addr), header_size);
/* update src_mask */
src_mask += header_size;
}
/* update src_ptr */
src_ptr = gSn_RX_BASE + src_mask;
/* save remote peer information & received data size */
peer_ip = header[0 to 3];
peer_port = header[4 to 5];
get_size = header[6 to 7];
/* if overflow SOCKET RX memory */
if ( (src_mask + get_size) > (gSn_RX_MASK + 1) )
{/* copy upper_size bytes of src_ptr to destination_addr */
upper_size = (gSn_RX_MASK + 1) – src_mask;
wizmemcpy((0xFE0000 + src_ptr), (0x000000 + destination_addr), upper_size);
/* update destination_addr*/
destination_addr += upper_size;
/* copy left_size bytes of gSn_RX_BASE to destination_addr */
left_size = get_size – upper_size;
wizmemcpy((0xFE0000 + gSn_RX_BASE), (0x000000 + destination_addr), left_size);
}
else
{/* copy len bytes of src_ptr to destination_addr */
wizmemcpy((0xFE0000 + src_ptr), (0x000000 + destination_addr), get_size);
}
/* increase Sn_RX_RD as length of len + header_size */
Sn_RX_RD = Sn_RX_RD + get_size + header_size;
/* set RECV command */
Sn_CR = RECV;
W7100A Datasheet v1.2.5 128
}
Check send data / Sending process
The size of DATA which user wants to transmit cannot be larger than Internal TX memory. If
it is larger than MTU, it is automatically divided by MTU unit and transmits.
The Sn_DIPR0 is set “255.255.255.255” when user wants to broadcast.
{/* first, get the free TX memory size */
FREESIZE:
freesize = Sn_TX_FSR;
if (freesize < len) goto FREESIZE; // len is send size
/* Write the value of remote_ip, remote_port to the SOCKET n Destination IP Address
Register(Sn_DIPR), SOCKET n Destination Port Register(Sn_DPORT). */
Sn_DIPR = remote_ip;
Sn_DPORT = remote_port;
/* calculate offset address */
dst_mask = Sn_TX_WR & gSn_TX_MASK; // dst_mask is offset address
/* calculate start address(physical address) */
dst_ptr = gSn_TX_BASE + dst_mask; // dst_ptr is physical start address
/* if overflow SOCKET TX memory */
if ( (dst_mask + len) > (gSn_TX_MASK + 1) )
{/* copy upper_size bytes of source_address to dst_ptr */
upper_size = (gSn_TX_MASK + 1) – dst_mask;
wizmemcpy((0x000000 + source_address), (0xFE0000 + dst_ptr), upper_size);
/* update source_address */
source_address += upper_size;
/* copy left_size bytes of source_address to gSn_TX_BASE */
left_size = send_size – upper_size;
wizmemcpy((0x000000 + source_address), (0xFE0000 + gSn_TX_BASE), left_size);
}
else
{/* copy len bytes of source_address to dst_ptr */
wizmemcpy((0x000000 + source_address), (0xFE0000 + dst_ptr), len);
}
/* increase Sn_TX_WR as length of len */
Sn_TX_WR += len;
/* set SEND command */
Sn_CR = SEND;
}
W7100A Datasheet v1.2.5 129
Check complete sending / Timeout
To transmit the next data, user must check that the prior SEND command is completed. The
larger the data size, the more time to complete the SEND command. Therefore, the user must
properly divide the data to transmit. The ARPTO can occur when user transmits UDP data. If
the ARPTO is occurred, the UDP data transmission will be failed.
First method :
{/* check SEND command completion */
while(Sn_IR(SENDOK)==‘0’) /* wait interrupt of SEND completion */
{/* check ARPTO */
if (Sn_IR(TIMEOUT)==‘1’) Sn_IR(TIMEOUT)=‘1’; goto Next stage;
}
Sn_IR(SENDOK) = ‘1’; /* clear previous interrupt of SEND completion */
}
Second method :
{
If (Sn_CR == 0x00) transmission is completed.
If (Sn_IR(TIMEOUT bit) == ‘1’) goto next stage;
/* In this case, if the interrupt of SOCKET n is activated, interrupt occurs. Refer to
Interrupt Register(IR), Interrupt Mask Register (IMR) and SOCKET n Interrupt Register (Sn_IR).
*/
}
Check Finished / SOCKET close
If user doesn’t need the communication any more, close the SOCKET n.
{/* clear remained interrupts */
Sn_IR = 0x00FF;
IR(n) = ‘1’;
/* set CLOSE command */
Sn_CR = CLOSE;
}
9.2.2.2 Multicast
The broadcast communication communicates with many and unspecified others. But the
multicast communication communicates with many but specified others who registered at
multicast-group. Suppose that A, B and C are registered at specified multicast-group. If user
transmits data to multicast-group (contains A), the B and C also receive the DATA for A. To use
multicast communication, the destination list registers to multicast-group by using IGMP
W7100A Datasheet v1.2.5 130
protocol. The multicast-group consists of ‘Group hardware address’, ‘Group IP address’ and
‘Group port number’. User cannot change the ‘Group hardware address’ and ‘Group IP
address’. But the ‘Group port number’ can be changed to what user wants.
The ‘Group hardware address’ is selected at the assigned range (From “01:00:5e:00:00:00”
to “01:00:5e:7f:ff:ff”) and the ‘Group IP address’ is selected in D-class IP address (From
“224.0.0.0” to “239.255.255.255”, please refer to the website;
Uhttp://www.iana.org/assignments/multicast-addressesU). When selecting, the upper 23bit of
6bytes ‘Group hardware address’ and the 4bytes ‘Group IP address’ must be the same. For
example, if the user selects the ‘Group IP address’ to “244.1.1.11”, the ‘Group hardware
address’ is selected to “01:00:5e:01:01:0b”. Please refer to the “RFC1112”
(Uhttp://www.ietf.org/rfc.htmlU).
In the W7100A, IGMP processing to register the multicast-group is internally (automatically)
processed. When the user opens the SOCKET n with multicast mode, the “Join” message is
internally transmitted. If the user closes it, the “Leave” message is internally transmitted.
After the SOCKET opens, the “Report” message is periodically and internally transmitted
when the user communicates.
The W7100A support IGMP version 1 and version 2 only. If user wants use an updated version,
the host processes IGMP directly by using the IPRAW mode SOCKET.
SOCKET Initialization
Choose one SOCKET for multicast communication among 8 SOCKETS of W7100A. Then set the
Sn_DHAR0 to ‘Multicast-group hardware address’ and set the Sn_DIPR0 to ‘Multicast-group IP
address’. Then set the Sn_PORT0 and Sn_DPORT0 to ‘Multicast-group port number’. Then set
the Sn_MR(P3:P0) to UDP and set the Sn_MR(MULTI) to ‘1’. Finally execute OPEN command. If
the state of Sn_SR is changed to SOCK_UDP after the OPEN command, the SOCKET
initialization is completed.
{
START:
/* set Multicast-Group information */
Sn_DHAR0 = 0x01; /* set Multicast-Group H/W address(01:00:5e:01:01:0b) */
Sn_DHAR1 = 0x00;
Sn_DHAR2 = 0x5E;
Sn_DHAR3 = 0x01;
Sn_DHAR4 = 0x01;
Sn_DHAR5 = 0x0B;
Sn_DIPR0 = 211; /* set Multicast-Group IP address(211.1.1.11) */
Sn_DIPR1 = 1;
Sn_DIPR2 = 1;
W7100A Datasheet v1.2.5 131
Sn_DIRP3 = 11;
Sn_DPORT = 0x0BB8; /* set Multicast-Group Port number(3000) */
Sn_PORT = 0x0BB8; /* set Source Port number(3000) */
Sn_MR = 0x02 | 0x80; /* set UDP mode & Multicast on SOCKET n Mode Register */
Sn_CR = OPEN; /* set OPEN command */
/* wait until Sn_SR is changed to SOCK_UDP */
if (Sn_SR != SOCK_UDP) Sn_CR = CLOSE; goto START;
}
Check received data
Refer to the section 9.2.2.1 ‘Unicast & Broadcast’.
Receiving process
Refer to the section 9.2.2.1 ‘Unicast & Broadcast’.
Check send data / Sending Process
Since the user sets the information about multicast-group at SOCKET initialization, user does
not need to set IP address and port number for destination any more. Therefore, copy the
transmission data to internal TX memory and executes SEND command.
{/* first, get the free TX memory size */
FREESIZE:
freesize = Sn_TX_FSR;
if (freesize < len) goto FREESIZE; // len is send size
/* calculate offset address */
dst_mask = Sn_TX_WR & gSn_TX_MASK; // dst_mask is offset address
/* calculate start address(physical address) */
dst_ptr = gSn_TX_BASE + dst_mask; // dst_ptr is physical start address
/* if overflow SOCKET TX memory */
if ( (dst_mask + len) > (gSn_TX_MASK + 1) )
{/* copy upper_size bytes of source_addr to dst_ptr */
upper_size = (gSn_TX_MASK + 1) – dst_mask;
wizmemcpy((0x000000 + source_addr), (0xFE0000 + dst_ptr), upper_size);
/* update source_addr*/
source_addr += upper_size;
/* copy left_size bytes of source_addr to gSn_TX_BASE */
left_size = len – upper_size;
wizmemcpy((0x000000 + source_addr), (0xFE0000 + gSn_TX_BASE), left_size);
}
W7100A Datasheet v1.2.5 132
else
{/* copy len bytes of source_addr to dst_ptr */
wizmemcpy((0x000000 + source_addr), (0xFE0000 + dst_ptr), len);
}
/* increase Sn_TX_WR as length of len */
Sn_TX_WR += send_size;
/* set SEND command */
Sn_CR = SEND;
}
Check complete sending / Timeout
Since the host manages all protocol process for data communication, the timeout cannot
occur.
{/* check SEND command completion */
while(Sn_IR(SENDOK)==‘0’); /* wait interrupt of SEND completion */
Sn_IR(SENDOK) = ‘1’; /* clear previous interrupt of SEND completion */
}
Check finished / SOCKET close
Refer to the section 9.2.2.1 ‘Unicast & Broadcast’.
9.2.3 IPRAW
The IPRAW is data communication using TCP, UDP and IP layers which are the lower protocol
layers. The IPRAW supports IP layer protocol such as ICMP (0x01) and IGMP (0x02) according to
the protocol number. The ‘ping’ of ICMP or IGMP v1/v2 is already included in W7100A by
hardware logic. But if the user needs, the host can directly process the IPRAW by opening the
SOCKET n to IPRAW. In the case of using IPRAW mode, user must set the protocol number field
of the IP header to what the user wants to use. The protocol number is defined by IANA. Refer
to the web (Uhttp://www.iana.org/assignments/protocol-numbersU). The protocol number
must be configured to Sn_PROTO before ‘SOCKET open’. In the IPRAW mode, the W7100A
does not support TCP (0x06) or UDP (0x11) protocol number. The SOCKET communication of
IPRAW mode only allows the communication of an assigned protocol number. The ICMP
SOCKET cannot receive unassigned protocol data except assigned protocol data such as IGMP.
W7100A Datasheet v1.2.5 133
Figure 9.7 IPRAW Operation Flow
SOCKET Initialization
Select the SOCKET and set the protocol number. Then set the Sn_MR(P3:P0) to IPRAW mode
and execute ‘OPEN’ command. If the Sn_SR is changed to SOCK_IPRAW after the ‘OPEN’
command, the SOCKET initialization is completed.
{
START:
/* sets Protocol number, the protocol number is used in Protocol Field of IP Header. */
Sn_PROTO = protocol_num;
/* sets IP raw mode */
Sn_MR = 0x03;
/* sets OPEN command */
Sn_CR = OPEN;
/* wait until Sn_SR is changed to SOCK_IPRAW */
if (Sn_SR != SOCK_IPRAW) Sn_CR = CLOSE; goto START;
}
Check received data
Refer to the section 9.2.2.1 ‘Unicast & Broadcast’.
Receiving process
Process the IPRAW data which is received in internal RX memory. The structure of received
IPRAW data is as below.
W7100A Datasheet v1.2.5 134
Real Data
2 Bytes
PACKET-INFO DATA packet
Size speicified in PACKET-INFO
Destination IP Address Byte size of
DATA packet
4 Bytes
Figure 9.8 The received IPRAW data format
The IPRAW data consists of 6bytes PACKET-INFO and DATA packet. The PACKET-INFO contains
information about the transmitter (IP address) and the length of the DATA-packet. The data
reception of IPRAW is the same as UDP data reception except processing the port number of
the transmitter in UDP PACKET-INFO. Refer to the section 9.2.2.1 ‘Unicast & Broadcast’.
If the transmitted DATA size is larger than RX memory free size of SOCKET n, user cannot
receive that DATA and also cannot receive fragmented DATA.
Check send data / Sending process
The size of DATA which user wants to transmit cannot be larger than Internal TX memory and
default MTU. The transmission of IPRAW data is the same as transmission of UDP data except
setting ‘Destination port number’. Refer to the section 9.2.2.1 ‘Unicast & Broadcast’.
Complete sending / Timeout
Same as UDP, please refer to the section 9.2.2 ‘UDP’.
Check finished / SOCKET closed
Same as UDP, please refer to the section 9.2.2 ‘UDP’.
9.2.4 MACRAW
The MACRAW communication is based on Ethernet MAC, and it can flexibly use upper layer
protocol to suit the host’s needs.
The MACRAW mode can only be used with a SOCKET. If the user uses the SOCKET in MACRAW
mode, not only can it use the SOCKET1~7 in the ‘Hardwired TCP/IP stack’, but it can also be
used as a NIC (Network Interface Controller). Therefore, any SOCKET1~7 can be used with
‘Software TCP/IP stack’. Since the W7100A supports ‘Hardwired TCP/IP stack’ and ‘Software
TCP/IP stack’, it calls ‘Hybrid TCP/IP stack’. If user wants more SOCKETs beyond the
supported 8 SOCKETS, the SOCKET in which the user wants high performance should be
utilizing the ‘‘Hardwired TCP/IP stack’, and the others should be using ‘Software TCP/IP
stack’ by MACRAW mode. So it overcomes the limited capacity of 8 SOCKETS. The SOCKET of
MACRAW mode can process all protocols except using in SOCKET1~7. Since the MACRAW
communication is pure Ethernet packet communication (there is no other processing), the
MACRAW designer should use the ‘Software TCP/IP stack’ to process the protocol. The
W7100A Datasheet v1.2.5 135
MACRAW data should basically contain the 6bytes of ‘Source hardware address’, 6bytes of
‘destination hardware address’ and 2bytes of ‘Ethernet type’ because it is based on Ethernet
MAC.
Figure 9.9 MACRAW Operation Flow
SOCKET Initialization
Select the SOCKET and set the SN_MR(P3:P0) to MACRAW mode. Then execute the ‘OPEN’
command. After the ‘OPEN’ command, if the Sn_SR is successfully changed to
‘SOCK_MACRAW’, the SOCKET initialization is completed. Since all information about
communication (Source hardware address, Source IP address, Source port number, Destination
hardware address, Destination IP address, Destination port number, Protocol header, etc.) is
in the ‘MACRAW data’, there is no more register setting.
{
START:
/* sets MAC raw mode */
S0_MR = 0x04;
/* sets OPEN command */
S0_CR = OPEN;
/* wait until Sn_SR is changed to SOCK_MACRAW */
if (S0_SR != SOCK_MACRAW) S0_CR = CLOSE; goto START;
}
Check received data
Refer to the section 9.2.2.1 ‘Unicast & Broadcast’.
W7100A Datasheet v1.2.5 136
Receiving process
Process the MACRAW data of the SOCKET which received it in internal RX memory. The
structure of the MACRAW data is as below:
Real Data
2 Bytes
PACKET-INFO DATA packet
Size speicified in PACKET-INFO
Byte size of
DATA packet
Cyclic Redundancy
Check
CRC
4 Bytes
Destination MAC
(6Bytes) Source MAC
(6Bytes) Type
(2Bytes) Payload
(46~1500Bytes)
Figure 9.10 The received MACRAW data format
The MACRAW data consists of ‘PACKET-INFO’, ‘DATA packet’ and 4bytes CRC. The ‘PACKET-
INFO’ is the length of the DATA packet. The ‘DATA packet’ consists of 6bytes ‘Destination MAC
address’, 6bytes ‘Source MAC address’ and 2bytes ‘Type’, 46~1500 bytes ‘Payload’. The
‘Payload’ of DATA packet consists of Internet protocol such as ARP, IP according to the ‘Type’.
The details of ‘Type’ please refer to the web:
(Uhttp://www.iana.org/assignments/ethernet-numbersU)
{ /* calculate offset address */
src_mask = S0_RX_RD & gS0_RX_MASK; // src_mask is offset address
/* calculate start address(physical address) */
src_ptr = gS0_RX_BASE + src_mask; // src_ptr is physical start address
/* get the size of packet */
len = get_Byte_sizeof_DATA_packet(); // Read the 2bytes PACKET-INFO
/* if overflow SOCKET RX memory */
If((src_mask + len) > (gS0_RX_MASK + 1))
{ /* copy upper_size bytes of get_start_address to destination_address */
upper_size = (gS0_RX_MASK + 1) – src_mask;
wizmemcpy((0xFE0000 + src_ptr), (0x000000 + destination_address), upper_size);
/* update destination_address */
destination_address += upper_size;
/* copy left_size bytes of gSn_RX_BASE to destination_address */
left_size = len – upper_size;
wizmemcpy((0xFE0000 + src_ptr), (0x000000 + destination_address), left_size);
}
else
{ /* copy len bytes of src_ptr to destination_address */
wizmemcpy((0xFE0000 + src_ptr), (0x000000 + destination_address), len);
}
/* increase Sn_RX_RD as length of len */
W7100A Datasheet v1.2.5 137
S0_RX_RD += len;
/* extract 4 bytes CRC from internal RX memory and then ignore it */
wizmemcpy((0xFE0000 + src_ptr), (0x000000 + dummy), len);
/* set RECV command */
S0_CR = RECV;
}
<Notice>
If the free size of the internal RX memory is smaller than the MACRAW data, a problem may
occasionally occur where some parts of that PACKET-INFO and DATA packet are stored to the
internal RX memory. Since the problem occurs as an analysis error for PACKET-INFO, it cannot
process the MACRAW data correctly. The closer the internal RX memory is to being full, the
higher the probability is for an error to occur. This problem can be resolved if user allows
some loss of the MACRAW data.
The solution is as follows:
▪ Process the internal RX memory as fast as possible to prevent that it closes to full.
▪ Reduce the receiving load by reception only its MACRAW data by setting the MF (MAC Filter)
bit of S0_MR in sample code of SOCKET initialization.
{
START:
/* sets MAC raw mode with enabling MAC filter */
S0_MR = 0x44;
/* sets OPEN command */
S0_CR = OPEN;
/* wait until Sn_SR is changed to SOCK_MACRAW */
if (Sn_SR != SOCK_MACRAW) S0_CR = CLOSE; goto START;
}
▪ If the free size of the internal RX memory is smaller than ‘1528 - Default
MTU(1514)+PACKET-INFO(2) + DATA packet(8) + CRC(4)’, close the SOCKET and process all
received data. Then reopen the SOCKET. After closing the SOCKET, the received MACRAW
data from closing time can be lost.
{/* check the free size of internal RX memory */
if((S0_RXMEM_SIZE(0) * 1024) – S0_RX_RSR(0) < 1528)
{
received_size = S0_RX_RSR(0); /* backup Sn_RX_RSR */
S0_CR = CLOSE; /* SOCKET Closed */
while(S0_SR != SOCK_CLOSED); /* wait until SOCKET is closed */
W7100A Datasheet v1.2.5 138
/* process all data remained in internal RX memory */
while(recved_size > 0)
{/* calculate offset address */
src_mask = S0_RX_RD & gS0_RX_MASK; // src_mask is offset address
/* calculate start address(physical address) */
src_ptr = gS0_RX_BASE + src_mask; // src_ptr is physical start address
/* if overflow SOCKET RX memory */
If((src_mask + len) > (gS0_RX_MASK + 1))
{/* copy upper_size bytes of get_start_address to destination_address */
upper_size = (gS0_RX_MASK + 1) – src_mask;
wizmemcpy((0xFE0000 + src_ptr), (0x000000 + destination_address), upper_size);
/* update destination_address */
destination_address += upper_size;
/* copy left_size bytes of gSn_RX_BASE to destination_address */
left_size = len – upper_size;
wizmemcpy((0xFE0000 + src_ptr), (0x000000 + destination_address), left_size);
}
else
{ /* copy len bytes of src_ptr to destination_address */
wizmemcpy((0xFE0000 + src_ptr), (0x000000 + destination_address), len);
}
/* increase Sn_RX_RD as length of len */
S0_RX_RD += len;
/* extract 4 bytes CRC from internal RX memory and then ignore it */
wizmemcpy((0xFE0000 + src_ptr), (0x000000 + dummy), len);
/* calculate the size of remained data in internal RX memory*/
recved_size = recved_size – 2 – len – 4;
}
/* Reopen the SOCKET */
/* sets MAC raw mode with enabling MAC filter */
S0_MR = 0x44; /* or S0_MR = 0x04 */
/* sets OPEN command */
S0_CR = OPEN;
/* wait until Sn_SR is changed to SOCK_MACRAW */
while (S0_SR != SOCK_MACRAW);
}
else /* process normally the DATA packet from internal RX memory */
{/* This block is same as the code of “Receiving process” stage*/
W7100A Datasheet v1.2.5 139
}
}
Check send data / Sending process
The size of the data which the user wants to transmit cannot be larger than the internal TX
memory and default MTU. The host generates the MACRAW data in the same format as the
“Receiving process” data packet, and transmits it. At this time, if the size of the generated
data is smaller than 60bytes, the transmitted Ethernet packet internally fills to 60bytes by
“Zero padding” and then it is transmitted.
{/* first, get the free TX memory size */
FREESIZE:
freesize = S0_TX_FSR;
if (freesize < send_size) goto FREESIZE;
/* calculate offset address */
dst_mask = Sn_TX_WR & gSn_TX_MASK; // dst_mask is offset address
/* calculate start address(physical address) */
dst_ptr = gSn_TX_BASE + dst_mask; // dst_ptr is physical start address
/* if overflow SOCKET TX memory */
if ( (dst_mask + len) > (gSn_TX_MASK + 1) )
{/* copy upper_size bytes of source_addr to dst_ptr */
upper_size = (gSn_TX_MASK + 1) – dst_mask;
wizmemcpy((0x000000 + source_addr), (0xFE0000 + dst_ptr), upper_size);
/* update source_addr*/
source_addr += upper_size;
/* copy left_size bytes of source_addr to gSn_TX_BASE */
left_size = len – upper_size;
wizmemcpy((0x000000 + source_addr), (0xFE0000 + gS0_TX_BASE), left_size);
}
else
{/* copy len bytes of source_addr to dst_ptr */
wizmemcpy((0x000000 + source_addr), (0xFE0000 + dst_ptr), len);
}
/* increase Sn_TX_WR as length of len */
S0_TX_WR += send_size;
/* set SEND command */
S0_CR = SEND;
}
W7100A Datasheet v1.2.5 140
Check complete sending
Since the host manages all protocol processors to communicate, the timeout can not be
occurred.
{/* check SEND command completion */
while(S0_IR(SENDOK)==‘0’); /* wait interrupt of SEND completion */
S0_IR(SENDOK) = ‘1’; /* clear previous interrupt of SEND completion */
}
Check finished / SOCKET close
Refer to the section 9.2.2.1 ‘Unicast & Broadcast’.
W7100A Datasheet v1.2.5 141
10 Electrical Specification
10.1 Absolute Maximum Ratings
Symbol
Parameter
Rating
Unit
VDD
DC supply voltage
-0.5 to 3.6
V
VIN
DC input voltage
-0.5 to 5.5 (5V tolerant)
V
VOUT
DC output voltage
0 to 3.3 (GPIO)
V
-0.5 to 3.6 (Others)
IIN
DC input current
5
mA
IOUT
DC output current
2 to 8
mA
TOP
Operating temperature
-40 to 80
C
TSTG
Storage temperature
-55 to 125
C
*COMMENT: Stressing the device beyond the “Absolute Maximum Ratings” may cause
permanent damage.
10.2 DC Characteristics
Symbol
Parameter
Test Condition
Min
Typ
Max
Unit
VDD
DC Supply voltage
Junction
temperature -55°C ~
125°C
3.0
3.3
3.6
V
VIH
High level input voltage
2.0
5.5
V
VIL
Low level input voltage
-0.5
0.8
V
VOH
High level output voltage
IOH = 8mA
2.4
V
VOL
Low level output voltage
IOL = 8mA
0.4
V
Ilkg
Input Leakage Current
VIN = VDD or 0
-10
1
10
A
Input Leakage Current
with pull-up resistance
VIN = 0
-15
-45
-85
A
Input Leakage Current
with pull-down resistance
VIN = VDD
15
45
85
A
IOZ
Tri-state output leakage
current
VOUT = VDD
2
8
A
IOL
Low level output current
VOL = 0.8V, 25°C, VDD
= 3.3V
52
mA
IOH
High level output current
VOL = 2.4V, 25°C, VDD
= 3.3V
52
mA
W7100A Datasheet v1.2.5 142
10.3 Power consumption(Driving voltage 3.3V)
Symbol
Parameter
Test Condition
Max
Unit
IBoot
Current consumption
Booting
250
mA
IIdle
Current consumption
Idle state
220
mA
IActive
Current consumption
Whole 8 SOCKETs running
220
mA
IPower-down
Current consumption
Power-down mode
108
mA
10.4 AC Characteristics
Reset Timing
Description
Min
Max
1
Reset Cycle Time
2 us
-
2
PLL Lock-in Time
50 us
10 ms
External memory access timing
Description
Min
Max
tALE
ALE signal duration = ALECON register value + 1
clock (clock speed = 88.4736MHz)
1 clock
256 clock
Taccess
External memory access period = 3us + EXTWTST
register value
3 us
744us
W7100A Datasheet v1.2.5 143
10.5 Crystal Characteristics
Parameter
Range
Frequency
25 MHz
Frequency Tolerance (at 25℃)
±30 ppm
Shunt Capacitance
7pF Max
Drive Level
1 ~ 500uW (100uW typical)
Load Capacitance
18pF
Aging (at 25℃)
±3ppm / year Max
※ When you use the Oscillator, it should refer to the table below.
Parameter
Range
Period jitter
120ps Max
Cycle-to cycle jitter
160ps Max
Long-term jitter
200ps Max
Clock duty cycle
40 ~ 60%
10.6 Transformer Characteristics
Parameter
Transmit End
Receive End
Turn Ratio
1:1
1:1
Inductance
350 uH
350 uH
In the case of using the internal PHY mode, be sure to use symmetric transformer in order to
support Auto MDI/MDIX (Crossover).
In the case of using the External PHY mode, use the transformer which is suitable for external
PHY specification.
W7100A Datasheet v1.2.5 144
11 IR Reflow Temperature Profile (Lead-Free)
Moisture Sensitivity Level: 3
Dry Pack Required: Yes
Average RAMp-Up Rate
(Tsmax to Tp)
3° C/second max.
Preheat
– Temperature Min (Tsmin)
– Temperature Max (Tsmax)
– Time (tsmin to tsmax)
150 °C
200 °C
60-180 seconds
Time maintained above:
– Temperature (TL)
– Time (tL)
217 °C
60-150 seconds
Peak/Classification Temperature (Tp)
260 + 0 °C
Time within 5 °C of actual Peak Temperature (tp)
20-40 seconds
RAMp-Down Rate
6 °C/second max.
Time 25 °C to Peak Temperature
8 minutes max.
W7100A Datasheet v1.2.5 145
12 Package Descriptions
12.1 Package type: LQFP 100
W7100A Datasheet v1.2.5 146
SYMBOL
MILLIMETER
INCH
MIN.
NOM.
MAX.
MIN.
NOM.
MAX.
A
-
-
1.60
-
-
0.063
A1
0.05
-
0.15
0.002
-
0.006
A2
1.35
1.40
1.45
0.053
0.055
0.057
b
0.17
0.22
0.27
0.007
0.009
0.011
b1
0.17
0.20
0.23
0.007
0.008
0.009
c
0.09
-
0.20
0.004
-
0.008
c1
0.09
-
0.16
0.004
-
0.006
D
15.85
16.00
16.15
0.624
0.630
0.636
D1
13.90
14.00
14.10
0.547
0.551
0.555
E
15.85
16.00
16.15
0.624
0.630
0.636
E1
13.90
14.00
14.10
0.547
0.551
0.555
e
0.50 BSC
0.020 BSC
L
0.45
0.60
0.75
0.018
0.024
0.030
L1
1.00 REF
0.039 REF
R1
0.08
-
-
0.003
-
-
R2
0.08
-
0.20
0.003
-
0.008
S
0.20
-
-
0.008
-
-
θ
0°
3.5°
7°
0°
3.5°
7°
θ1
0°
-
-
0°
-
-
θ2
12° TYP
12° TYP
θ3
12° TYP
12° TYP
Note :
① To be determined at seating plane – C -.
② Dimensions ‘D1’ and ‘E1’ do not include mold protrusion. D1’ and ‘E1’ are maximum
plastic body size dimensions including mold mismatch.
③ Dimension ‘b’ does not include dambar protrusion. Dambar cannot be located on the
lower radius or the foot.
④ Exact shape of each corner is optional
⑤ These Dimensions apply to the flat section of the lead between 0.10mm and 0.25mm
from the lead tip.
⑥ A1 is defined as the distance from the seating plane to the lowest point of the
package body.
⑦ Controlling dimension : Millimeter
⑧ Reference Document : JEDEC MS-026 , BED.
W7100A Datasheet v1.2.5 147
12.2 Package type: QFN 64
* CONTROLLING DIMENSION: mm
W7100A Datasheet v1.2.5 148
SYMBOL
MILLIMETER
INCH
MIN.
NOM.
MAX.
MIN.
NOM.
MAX.
A
-
-
0.90
-
-
0.035
A1
-
-
0.05
-
-
0.002
A2
-
0.65
0.70
-
0.026
0.028
A3
0.200 REF.
0.008 REF.
b
0.18
0.25
0.30
0.007
0.010
0.012
D
15.85
16.00
16.15
0.624
0.630
0.636
D
9.00 bsc
0.354 bsc
D2
5.90
6.00
6.10
0.232
0.236
0.240
E
9.00 bsc
0.354 bsc
E2
5.90
6.00
6.10
0.232
0.236
0.240
L
0.35
0.40
0.45
0.014
0.016
0.018
e
0.50 bsc
0.020 bsc
R
0.09
-
-
0.004
-
-
TOLERANCES OF FORM AND POSITION
aaa
0.10
0.004
bbb
0.10
0.004
ccc
0.05
0.002
Note:
① All dimensions are in millimeters.
② Die thickness allowable is 0.305mm maximum (0.012 inches maximum).
③ Dimensioning & tolerances conform to ASME Y14.5M. -1994.
④ The pin #1 identifier must be placed on the top surface of the package by using
indentation mark of other feature of package body.
⑤ Exact shape and size of this feature is optional.
⑥ Package WARPAGE max 0.08mm.
⑦ Applied for exposed pad and terminals, exclude embedding part of exposed pad from
measuring.
⑧ Applied to terminals.
W7100A Datasheet v1.2.5 149
13 Appendix:Performance Improvement about W7100A
This section presents the benefits gained about calculation by using W7100A over standard
8051 family.
13.1 Summary
The 8-bit operation cycles of the 80C51 and W7100A with addition, subtraction,
multiplication and division are as below. It is briefly shows its performance. The W7100A with
‘wizmemcpy’ (supported by WIZnet) function is almost 9 times faster than the 80C51.
80C51 cycle
W7100A cycle / with
user code
W7100A cycle / with
wizmemcpy
ADD
36
12
4
SUB
36
12
4
MUL
96
12
6
DIV
96
20
10
In the succeeded section shows more detail performance.
13.2 8–Bit Arithmetic Functions
13.2.1 Addition
Immediate data
The following code performs immediate data (constant) addition to an 8-bit register.
RX = RX + #n
Mnemonic
Opcode
Byte
80C51 Cycle
W7100A Cycle
ISP /
wizmemcpy
FLASH /
user code
MOV
A, Rx
E8h – EFh
1
12
1
4
ADD
A, #n
24h
2
12
2
4
MOV
Rx, A
F8h – FFh
1
12
1
4
Sum :
36
4
12
Note. ‘wizmemcpy’ function are built-in inside Boot ROM in W7100A. Refer to the ‘Driver
Guide.’
Direct addressing
The following code performs direct addressing addition to an 8-bit register.
Rx = Rx + (dir)
W7100A Datasheet v1.2.5 150
Mnemonic
Opcode
Byte
80C51 Cycle
W7100A Cycle
ISP /
wizmemcpy
FLASH /
user code
MOV
A, Rx
E8h – EFh
1
12
1
4
ADD
A, dir
25h
2
12
2
4
MOV
Rx, A
F8h – FFh
1
12
1
4
Sum :
36
4
12
Indirect addressing
The following code performs indirect addressing addition to an 8-bit register.
Rx = Rx + (@Rx)
Mnemonic
Opcode
Byte
80C51 Cycle
W7100A Cycle
ISP /
wizmemcpy
FLASH /
user code
MOV
A, Rx
E8h – EFh
1
12
1
4
ADD
A, @Rx
26h – 27h
1
12
2
4
MOV
Rx, A
F8h – FFh
1
12
1
4
Sum :
36
4
12
Register addressing
The following code performs an 8-bit register to register addition.
Rx = Rx + Ry
Mnemonic
Opcode
Byte
80C51 Cycle
W7100A Cycle
ISP /
wizmemcpy
FLASH /
user code
MOV
A, Rx
E8h – EFh
1
12
1
4
ADD
A, Ry
28h – 2Fh
1
12
1
4
MOV
Rx, A
F8h – FFh
1
12
1
4
Sum :
36
3
12
W7100A Datasheet v1.2.5 151
13.2.2 Subtraction
Immediate data
The following code performs immediate data (constant) subtraction from an 8-bit register.
Rx = Rx - #n
Mnemonic
Opcode
Byte
80C51 Cycle
W7100A Cycle
ISP /
wizmemcpy
FLASH /
user code
MOV
A, Rx
E8h – EFh
1
12
1
4
SUBB
A, #n
24h
2
12
2
4
MOV
Rx, A
F8h – FFh
1
12
1
4
Sum :
36
4
12
Direct addressing
The following code performs direct addressing subtraction from an 8-bit register.
Rx = Rx – (dir)
Mnemonic
Opcode
Byte
80C51 Cycle
W7100A Cycle
ISP /
wizmemcpy
FLASH /
user code
MOV
A, Rx
E8h – EFh
1
12
1
4
SUBB
A, dir
25h
2
12
2
4
MOV
Rx, A
F8h – FFh
1
12
1
4
Sum :
36
4
12
Indirect addressing subtraction
The following code performs indirect addressing subtraction from an 8-bit register.
Rx = Rx – (@Ry)
Mnemonic
Opcode
Byte
80C51 Cycle
W7100A Cycle
ISP /
wizmemcpy
FLASH /
user code
MOV
A, Rx
E8h – EFh
1
12
1
4
SUBB
A, @Ry
26h – 27h
1
12
2
4
MOV
Rx, A
F8h – FFh
1
12
1
4
Sum :
36
4
12
Register addressing subtraction
The following code performs an 8-bit register from register subtraction.
W7100A Datasheet v1.2.5 152
Rx = Rx - Ry
Mnemonic
Opcode
Byte
80C51 Cycle
W7100A Cycle
ISP /
wizmemcpy
FLASH /
user code
MOV
A, Rx
E8h – EFh
1
12
1
4
SUBB
A, Ry
28h – 2Fh
1
12
1
4
MOV
Rx, A
F8h – FFh
1
12
1
4
Sum :
36
3
12
13.2.3 Multiplication
The following code performs the 8-bit register multiplication.
Rx = Rx * Ry
Mnemonic
Opcode
Byte
80C51 Cycle
W7100A Cycle
ISP /
wizmemcpy
FLASH /
user code
MOV
A, Rx
E8h – EFh
1
12
1
4
MOV
B, Ry
88h – 8Fh
2
24
2
4
MUL
AB
A4h
1
48
2
4
MOV
Rx, A
F8h – FFh
1
12
1
4
Sum :
96
6
12
13.2.4 Division
The following code performs the 8-bit register division.
Rx = Rx / Ry
Mnemonic
Opcode
Byte
80C51 Cycle
W7100A Cycle
ISP /
wizmemcpy
FLASH /
user code
MOV
A, Rx
E8h – EFh
1
12
1
4
MOV
B, Ry
88h – 8Fh
2
24
2
4
DIV
AB
84h
1
48
6
8
MOV
Rx, A
F8h – FFh
1
12
1
4
Sum :
96
10
20
13.3 16-Bit Arithmetic Functions
13.3.1 Addition
The following code performs 16-bit addition. The first operand and result are located in
registers pair RaRb. The second operand is located in registers pair RxRy.
W7100A Datasheet v1.2.5 153
RaRb = RaRb + RxRy
Mnemonic
Opcode
Byte
80C51 Cycle
W7100A Cycle
ISP /
wizmemcpy
FLASH /
user code
MOV
A, Rb
E8h – EFh
1
12
1
4
ADD
A, Ry
28h – 2Fh
1
12
1
4
MOV
Rb, A
F8h – FFh
1
12
1
4
MOV
A, Ra
E8h – EFh
1
12
1
4
ADDC
A, Rx
38h – 3Fh
1
12
1
4
MOV
Ra, A
F8h – FFh
1
12
1
4
Sum :
72
6
24
13.3.2 Subtraction
The following code performs 16-bit subtraction. The first operand and result are located in
registers pair RaRb. The second operand is located in registers pair RxRy.
RaRb = RaRb – RxRy
Mnemonic
Opcode
Byte
80C51 Cycle
W7100A Cycle
ISP /
wizmemcpy
FLASH /
user code
CLR
C
C3h
1
12
1
4
MOV
A, Rb
E8h – EFh
1
12
1
4
SUBB
A, Ry
98h – 9Fh
1
12
1
4
MOV
Rb, A
F8h – FFh
1
12
1
4
MOV
A, Ra
E8h – EFh
1
12
1
4
SUBB
A, Rx
98h – 9Fh
1
12
1
4
MOV
Ra, A
F8h – FFh
1
12
1
4
Sum :
84
7
28
13.3.3 Multiplication
The following code performs 16-bit multiplication. The first operand and result are located
in registers pair RaRb. The second operand is located in registers pair RxRy.
RaRb = RaRb * RxRy
Mnemonic
Opcode
Byte
80C51 Cycle
W7100A Cycle
ISP /
wizmemcpy
FLASH /
user code
MOV
A, Rb
E8h – EFh
1
12
1
4
W7100A Datasheet v1.2.5 154
MOV
B, Ry
88h – 8Fh
2
24
2
4
MUL
AB
A4h
1
48
2
4
MOV
Rz, B
A8h – AFh
2
24
3
4
XCH
A, Rb
C8h – CFh
1
12
2
4
MOV
B, Rx
88h – 8Fh
2
24
2
4
MUL
AB
A4h
1
48
2
4
ADD
A, Rz
28h - 2Fh
1
12
1
4
XCH
A, Ra
C8h – CFh
1
12
2
4
MOV
B, Ry
88h – 8Fh
2
24
2
4
MUL
AB
A4h
1
48
2
4
ADD
A, Ra
28h – 2Fh
1
12
1
4
MOV
Ra, A
F8h – FFh
1
12
1
4
Sum :
312
23
52
13.4 32-bit Arithmetic Functions
13.4.1 Addition
The following code performs 32-bit addition. The first operand and result are located in four
registers RaRbRcRd. The second operand is located in four registers RvRxRyRz.
RaRbRcRd = RaRbRcRd + RvRxRyRz
Mnemonic
Opcode
Byte
80C51 Cycle
W7100A Cycle
ISP /
wizmemcpy
FLASH /
user code
MOV
A, Rd
E8h – EFh
1
12
1
4
ADD
A, Rz
28h – 2Fh
1
12
1
4
MOV
Rd, A
F8h – FFh
1
12
1
4
MOV
A, Rc
E8h – EFh
1
12
1
4
ADDC
A, Ry
38h – 3Fh
1
12
1
4
MOV
Rc, A
F8h – FFh
1
12
1
4
MOV
A, Rb
E8h – EFh
1
12
1
4
ADDC
A, Rx
38h – 3Fh
1
12
1
4
MOV
Rb, A
F8h – FFh
1
12
1
4
MOV
A, Ra
E8h – EFh
1
12
1
4
ADDC
A, Rv
38h – 3Fh
1
12
1
4
MOV
Ra, A
F8h – FFh
1
12
1
4
Sum :
144
12
48
W7100A Datasheet v1.2.5 155
13.4.2 Subtraction
The following code performs 32-bit subtraction. The first operand and result are located in
four registers RaRbRcRd. The second operand is located in four registers RvRxRyRz.
RaRbRcRd = RaRbRcRd – RvRxRyRz
Mnemonic
Opcode
Byte
80C51 Cycle
W7100A Cycle
ISP /
wizmemcpy
FLASH /
user code
CLR
C
C3h
1
12
1
4
MOV
A, Rd
E8h – EFh
1
12
1
4
SUBB
A, Rz
98h – 9Fh
1
12
1
4
MOV
Rd, A
F8h – FFh
1
12
2
4
MOV
A, Rc
E8h – EFh
1
12
1
4
SUBB
A, Ry
98h – 9Fh
1
12
2
4
MOV
Rc, A
F8h – FFh
1
12
2
4
MOV
A, Rb
E8h – EFh
1
12
1
4
SUBB
A, Rx
98h – 9Fh
1
12
1
4
MOV
Rb, A
F8h – FFh
1
12
1
4
MOV
A, Ra
E8h – EFh
1
12
1
4
SUBB
A, Rv
98h – 9Fh
1
12
1
4
MOV
Ra, A
F8h – FFh
1
12
1
4
Sum :
156
13
52
13.4.3 Multiplication
The following code performs 32-bit multiplication. The first operand and result are located
in four registers RaRbRcRd. The second operand is located in four registers RvRxRyRz.
RaRbRcRd = RaRbRcRd * RvRxRyRz
Mnemonic
Opcode
Byte
80C51 Cycle
W7100A Cycle
ISP /
wizmemcpy
FLASH /
user code
MOV
A, R0
E8h – EFh
1
12
1
4
MOV
B, R7
88h – 8Fh
2
24
2
4
MUL
AB
A4h
1
48
2
4
XCH
A, R4
C8h – CFh
1
12
2
4
MOV
B, R3
88h – 8Fh
2
24
2
4
MUL
AB
A4h
1
48
2
4
ADD
A, R4
28h – 2Fh
1
12
1
4
MOV
R4, A
F8h – FFh
1
12
1
4
W7100A Datasheet v1.2.5 156
MOV
A, R1
E8h – EFh
1
12
1
4
MOV
B, R6
88h – 8Fh
2
24
2
4
MUL
AB
A4h
1
48
2
4
ADD
A, R4
28h – 2Fh
1
12
1
4
MOV
R4, A
F8h – FFh
1
12
1
4
MOV
B, R2
88h – 8Fh
2
24
2
4
MOV
A, R5
E8h – EFh
1
12
2
4
MUL
AB
A4h
1
48
2
4
ADD
A, R4
28h – 2Fh
1
12
1
4
MOV
R4, A
F8h – FFh
1
12
1
4
MOV
A, R2
E8h – EFh
1
12
1
4
MOV
B, R6
88h – 8Fh
2
24
2
4
MUL
AB
A4h
1
48
2
4
XCH
A, R5
C8h – CFh
1
12
2
4
MOV
R0, B
A8h – AFh
2
24
3
4
MOV
B, R3
88h – 8Fh
2
24
2
4
MUL
AB
A4h
1
48
2
4
ADD
A, R5
28h – 2Fh
1
12
1
4
XCH
A, R4
C8h – CFh
1
12
2
4
ADDC
A, R0
38h – 3Fh
1
12
1
4
ADD
A, B
25h
2
12
2
4
MOV
R5, A
F8h – FFh
1
12
1
4
MOV
A, R1
E8h – EFh
1
12
1
4
MOV
B, R7
88h – 8Fh
2
24
2
4
MUL
AB
A4h
1
48
2
4
ADD
A, R4
28h – 2Fh
1
12
1
4
XCH
A, R5
C8h – CFh
1
12
2
4
ADDC
A, B
35h
2
12
2
4
MOV
R4, A
F8h – FFh
1
12
1
4
MOV
A, R3
E8h – EFh
1
12
1
4
MOV
B, R6
88h – 8Fh
2
24
2
4
MUL
AB
A4h
1
48
2
4
MOV
R6, A
F8h – FFh
1
12
1
4
MOV
R1, B
A8h – AFh
2
24
3
4
MOV
A, R3
E8h – EFh
1
12
1
4
MOV
B, R7
88h – 8Fh
2
24
2
4
MUL
AB
A4h
1
48
2
4
W7100A Datasheet v1.2.5 157
XCH
A, R7
C8h – CFh
1
12
2
4
XCH
A, B
C5h
2
12
3
4
ADD
A, R6
28h – 2Fh
1
12
1
4
XCH
A, R5
C8h – CFh
1
12
2
4
ADDC
A, R1
38h – 3Fh
1
12
1
4
MOV
R6, A
F8h – FFh
1
12
1
4
CLR
A
E4h
1
12
1
4
ADDC
A, R4
38h – 3Fh
1
12
1
4
MOV
R4, A
F8h – FFH
1
12
1
4
MOV
A, R2
E8h – EFh
1
12
1
4
MUL
AB
A4h
1
48
2
4
ADD
A, R5
28h – 2Fh
1
12
1
4
XCH
A, R6
C8h – CFh
1
12
2
4
ADDC
A, B
38h – 3Fh
2
12
2
4
MOV
R5, A
F8h – FFh
1
12
1
4
CLR
A
E4h
1
12
1
4
ADDC
A, R4
38h – 3Fh
1
12
1
4
MOV
R4, A
F8h – FFh
1
12
1
4
Sum :
1248
99
252
W7100A Datasheet v1.2.5 158
Document History Information
Version
Date
Descriptions
Ver.0.9.1 βeta
Sep. 2009
Release with W7100 launching
Ver.0.9.2
Dec. 2009
1. Deleted “How to program FLASH memory in W7100”
document
2. Modify at 2.5.10, “APP Entry RD/WR Enable” => “APP
Entry(0xFFF7 ~ 0xFFFF) RD/WR Enable”(P.40)
3. Deleted “tri-state signals in I/O pins at 3 I/O Ports”
Ver.0.9.3
Feb. 2010
Modify “XTLP0 and XTLP1 explanations at 1.4.2.5
Interrupt/Clock”(P.19)
Ver.0.9.4
Apr. 2010
1. Modify “Sn_IMR initial value 0x00 => 0xFF”
2.Added “INTLEVEL register to TCPIP Core common register
at 8.2.1 Common Register” (P.74)
Ver.0.9.5
May. 2010
Deleted “PPPoE protocol cause of errata”
Ver.0.9.6
Jan. 2011
1. Added “at 2.5 SFR definition and PPPoE function at
1.3.2 TCPIPCore” (P.34, P.14)
2. Modify “GPIO in/out voltage for revision for W7100A at
10.1 Absolute Maximum Ratings” (P.137)
Ver.1.0.0
Mar. 2011
1. Deleted “information about external memory accessing”
2. Added “64pin number information at 1.4.2 Pin
Description” (P.17)
Ver.1.1.0
May. 2011
Define “voltage of OSC (clock source) input”(P.141)
Ver.1.1.1
May. 2011
1. Modify “Pin Layout(nWR, nRD) at 1.4.1 Pin Layout”
(P.16)
2. Added “at 1.4.2.6 GPIO” (P.20)
3. Added “at 1.4.2.7 External Memory” (P.21)
Ver.1.1.2
May. 2011
Corrected “GPIO pull-up, pull-down resistor value at 4.1
I/O Port” (P.48)
W7100A Datasheet v1.2.5 159
Ver.1.1.3
Nov. 2011
Modify “VCC3V3 power supply signal descriptions (KR) at
1.4.2.10 Power supply signal” (P.22)
Ver.1.1.4
Jan. 2012
1. Added “product endurance at W7100A Features at 1.2
W7100A Features” (P.11)
2. Added “recommendation note at 2. Memory” (P.26)
3.Modify “pin number of PLOCK in table at 1.4.2.1
configuration“ (P.18)
(table 1.4.2.1, add the QFN64 pin number of PLOCK)
Ver.1.1.5
May. 2012
Modify “Table 2.2 WTST Register Values of WTST at 2.5.2
Program Code Wait States Register” (P.34)
(The access time of WTST[2:0] values ‘3’ changed to ‘Not
Used’)
Ver. 1.1.6
Jun. 2012
1. Modify “description of Figure 2.14 at 2.5.2 Program
Code Wait States Register” (P.34)
2. Modify “WTST value ‘3’ changed to ‘4’ at 2.5.2 Program
Code Wait States Register” (P.34)
Ver. 1.2.0
Sep. 2012
1. Modify “Figure 2.6 and 2.7 at 2.3.1 Standard 8051
Interface” (according to the W7100A errata sheet (erratum
3)) (P.31)
2. Added “recommendation note of erratum 3 at 2.3.1
standard 8051 interface” (P.30)
Ver. 1.2.1
Jan. 2013
1. Added “Figure 4.1 Port0 Pull-down register at 4 I/O
port”(P.48)
2. Modify “Table at 10.2 DC Characteristics” (P.141)
(Add the Ilkg(leakage), and lOZ, Modify the VOH and VOL)
Ver. 1.2.2
Jun. 2013
1. Added “recommendation of watchdog timer interrupt at
7.4 Simple Timer”(P.69)
Ver. 1.2.3
May. 2014
1. Added Pull-up, Pull-down information of some pins
(P.17~19)
Ver. 1.2.4
Nov. 2015
1. Modify “pin name of P0.5 at 1.4.2.6 GPIO” (P.20)
Ver. 1.2.4
Jul. 2016
Add to item of Crystal Characteristics (P.143)
W7100A Datasheet v1.2.5 160
- Period jitter
- Cycle-to-cycle jitter
- Long-term jitter
- Clock duty cycle
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