MCS9815CV-BA - ASIX Electronics Corporation

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MCS9815

PCI to Dual Parallel Controller

Revision 2.01

Sep. 12th, 2012

MCS9815

PCI to Dual Parallel Controller

Datasheet

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MCS9815

PCI to Dual Parallel Controller

IMPORTANT NOTICE

DISCLAIMER

No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, including

photocopying and recording, for any purpose, without the express written permission of ASIX. ASIX may make changes to the

product specifications and descriptions in this document at any time, without notice.

ASIX provides this document “as is” without warranty of any kind, either expressed or implied, including without limitation

warranties of merchantability, fitness for a particular purpose, and non-infringement.

Designers must not rely on the absence or characteristics of any features or registers marked “reserved”, “undefined” or “NC”.

ASIX reserves these for future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising

from future changes to them. Always contact ASIX to get the latest document before starting a design of ASIX products.

TRADEMARKS

ASIX, the ASIX logo are registered trademarks of ASIX Electronics Corporation. All other trademarks are the property of their

respective owners.

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MCS9815

PCI to Dual Parallel Controller

Table of Contents

1. General Description .................................................................................................................................. 4

2. Features ..................................................................................................................................................... 4

3. Applications ............................................................................................................................................... 4

4. Ordering Information ............................................................................................................................... 5

5. Application Schematic .............................................................................................................................. 5

6. Evaluation Board ...................................................................................................................................... 5

7. Software Support ....................................................................................................................................... 5

8. Certifications ............................................................................................................................................. 5

9. Block Diagram .......................................................................................................................................... 6

10. Pin Diagram ............................................................................................................................................ 7

11. Pin Descriptions ...................................................................................................................................... 8

12. Architectural overview .......................................................................................................................... 12

12.1 PCI Core ........................................................................................................................................................ 12

12.2 Parallel Port ................................................................................................................................................... 16

12.3. External EEPROM ...................................................................................................................................... 19

13. Extended Modes through EEPROM .................................................................................................... 19

14. EEPROM Contents ............................................................................................................................... 20

15. Electrical Specifications ....................................................................................................................... 23

16. Mechanical Specifications – QFP 128 ................................................................................................. 25

Revision History .......................................................................................................................................... 26

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MCS9815

PCI to Dual Parallel Controller

1. General Description

The MCS9815CV-BA is a dual printer port controller with PCI Bus Interface. Parallel Port interface in

MCS9815CV-BA is an IEEE 1284 compliant SPP / PS2 / EPP / ECP Parallel Port that fully supports

Centronics interface.

The MCS9815CV-BA is ideally suited for PC applications, such as Add-On Parallel Ports. It is available

in 128-Pin QFP package & fabricated using an advanced submicron CMOS process to achieve low

power drain and high-speed requirements.

MCS9815CV-BA is designed to be pin compatible with previous version of MCS9815CV. Existing

designs of MCS9815CV can be migrated to MCS9815CV-BA without any modification to system design.

Software compatibility is also maintained between MCS9815CV to MCS9815CV-BA.

2. Features

General

 5V Operation

 Low Power

 Fully compliant with PCI Local Bus Specification 2.3

 Re-map function for Legacy Ports

 Microsoft WHQL Complaint Drivers

 128 Pin QFP package, RoHS

 Commercial Grade, 0 to 70 deg C

 Advanced testability through scan addition

IEEE1284 Parallel Port

 Multi-mode IEEE1284 compliant controller (SPP, PS2, EPP, ECP)

 Faster data rates up to 1.5Mbytes/sec for Parallel Port

Miscellaneous

 Four -Wire SPI Interface for EEPROM

 EEPROM read through PCI

3. Applications

 Parallel / Printer Port based applications

 Add-On I/O Cards – Parallel

 Embedded systems – For I/O expansion

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PCI to Dual Parallel Controller

4. Ordering Information

 Part Number : MCS9815CV-BA

 128 Pin QFP

 ROHS

 Commercial Grade, 0 to 70 deg C

5. Application Schematic

 PCI to 2 Parallel

6. Evaluation Board

 MCS98XXCV-BA EVB – Combo

7. Software Support

SW Driver Support

 Windows 95/98SE/ME

 Windows 32bit - 2000 /XP /NT /2003 Server

 Windows 64bit XP / 2003 Server

 Windows Vista / 2008 Server (32 & 64 bit)

 Windows 7 (32 & 64 bit)

 Linux Kernel 2.4.X / 2.6.X

 DOS-6.22

SW Utility Support

 Windows XP based Diagnostic Utility

 DOS based diagnostic Utility

8. Certifications

 WHQL Certification of device drivers for Windows XP, Windows Vista & Windows 7 Operating

Systems.

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PCI to Dual Parallel Controller

9. Block Diagram

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PCI to Dual Parallel Controller

10. Pin Diagram

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MCS9815

PCI to Dual Parallel Controller

11. Pin Descriptions

This section provides information on each Pin of MCS9815CV-BA

Name

Pin #

Direction

Drive

Strength

Description

CLK

122

I

33 MHz PCI System Clock input.

nRESET

121

I(PU)

PCI system Reset (active low).Resets all internal

registers, sequencers, and signals to a consistent

state. During reset condition, AD[31-0] and

nSERR are tri- stated.

AD[31-29]

126-128

I/O

8mA

Multiplexed PCI Address/Data bus. During the

address phase, AD[31-0] contain a physical

address. Data is stable and valid when nIRDY and

nTRDY are asserted (active).

AD[28-24]

2-6

I/O

8mA

See AD[31-29] description.

AD[23-16]

11-18

I/O

8mA

See AD[31-29] description.

AD[15-11]

34-38

I/O

8mA

See AD[31-29] description.

AD[10-8]

40-42

I/O

8mA

See AD[31-29] description.

AD[7-0]

46-53

I/O

8mA

See AD[31-29] description.

nFRAME

23

I

nFRAME is asserted by the current Bus

Master to indicate the beginning of an transfer.

nFRAME remains active until the last Byte of

the transfer

is to be processed.

nIRDY

24

I

Initiator Ready. During a write, nIRDY asserted

indicates that the initiator is driving valid data onto

the data bus. During a read, nIRDY asserted

indicates that the initiator is ready to accept data

from the target device.

nTRDY

25

O

8mA

Target Ready (three-state). Asserted when the

target is ready to complete the current data

phase.

nSTOP

27

O

8mA

Asserted to indicate that the target wishes the

initiator to stop the transaction in progress on

the current data phase.

nLOCK

28

I

Indicates an atomic operation that may require

multiple transactions to complete.

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PCI to Dual Parallel Controller

Name

Pin #

Direction

Drive

Strength

Description

IDSEL

9

I

Initialization Device Select. Used as a chip select

during configuration read and write transactions.

nDEVSEL

26

O

8mA

Device Select (three-state). Asserted when the

target has decoded one of its addresses.

nPERR

29

I/O

8mA

Parity Error (three-state).Used to report parity

errors during all PCI transactions except a

special cycle. The minimum duration of nPERR is

one clock cycle.

nSERR

30

O

8mA

System Error (open drain). This pin goes low

when address parity errors are detected.

PAR

31

I/O

8mA

Parity. Even Parity is applied across AD31-0

and nC/BE3-0. PAR is stable and valid one

clock after the address phase. For the data

phase, PAR is stable and valid one clock after

either nIRDY is asserted on a write transaction,

or nTRDY is asserted on a read transaction.

nC/BE3

8

I

Bus Command and Byte Enable. During the

address phase of a transaction, nC/BE3-0

defines the bus command. During the data

phase, nC/BE3-0 are used as Byte Enables.

nC/BE3 applies to Byte “3”.

nC/BE2

22

I

Bus Command and Byte Enable. During the

address phase of a transaction, nC/BE3-0

defines the bus command. During the data

phase, nC/BE3-0 is used as Byte Enables.

nC/BE2 applies to Byte “2”.

nC/BE1

32

I

Bus Command and Byte Enable. During the

address phase of a transaction, nC/BE3-0

defines the bus command. During the data

phase, nC/BE3-0 are used as Byte Enables.

nC/BE1 applies to Byte “1”.

nC/BE0

43

I/O

Bus Command and Byte Enable. During the

address phase of a transaction, nC/BE3-0

defines the bus command. During the data

phase, nC/BE3-0 are used as Byte Enables.

nC/BE0 applies to Byte “0”.

nINTA

120

O

12mA

PCI active low interrupt output (open-drain). This

signal goes low (active) when an interrupt

condition occurs.

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PCI to Dual Parallel Controller

Name

Pin #

Direction

Drive

Strength

Description

EE-CS

115

O

4mA

External EEPROM chip select (active high). After

Power-On Reset, the EEPROM is read, and the

read-only configuration registers are filled

sequentially from the first 64 Bytes in the

EPROM.

EE-CLK

116

O

4mA

External EEPROM clock.

EE-DI

118

I

External EEPROM data input.

EE-DO

117

O

4mA

External EEPROM data output.

EE-EN

123

I(PU)

Enable EEPROM (active high, internal pull-up).

The external EEPROM can be disabled when this

pin is tied to GND or pulled low. When the

EEPROM is disabled, default values for PCI

configuration registers will be used.

SLCTB

SLCTA

68

84

I(PU)

Peripheral/printer selected (internal pull-up). This

pin is set high by peripheral/printer when it is

selected.

PEB

PEA

69

87

I(PU)

Paper Empty (internal pull-up). This pin is set

high by Peripheral / Printer to indicate Paper

Empty condition.

BUSYB

BUSYA

70

85

I(PU)

Peripheral/printer Busy (internal pull-up).This pin

is set high by peripheral/printer, when printer or

peripheral is not ready to accept data.

nACKB

nACKA

71

86

I(PU)

Peripheral/printer data Acknowledge (internal pull-

up). This pin is set low by peripheral/printer to

indicate a successful data transfer has taken

place.

nFAULTB

nFAULTA

72

83

I(PU)

Peripheral/printer Data Error (internal pull-up).

This pin is set low by peripheral/printer during an

error condition.

nSTROBEB

nSTROBEA

76

81

OD_O

(PU)

12mA

Peripheral/printer data Strobe (open drain, active

low). When low, data is latched into the printer.

nAUTOFDXB

nAUTOFDXA

75

80

OD_O

(PU)

12mA

Peripheral/printer Auto Feed (open-drain, active

low). Continuous auto fed paper is selected

when this pin is set low.

nINITB

nINITA

74

79

OD_O

(PU)

12mA

Initialize the peripheral/printer (open drain, active

low). When set low, the peripheral/printer starts

its initialization routine.

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PCI to Dual Parallel Controller

Name

Pin #

Direction

Drive

Strength

Description

nSLCTINB

nSLCTINA

73

78

OD_O

(PU)

12mA

Peripheral/printer Select (open-drain, active low).

Selects the peripheral/printer when it is set low.

PB[7-5]

PA[7-4]

105-107

98-95

I/O

12mA

Peripheral / Printer bi-directional data bus

PB[4-0]

PA[3-0]

109-113

93-90

I/O

12mA

Peripheral / Printer bi-directional data bus

Test_Mode_N

67

I(PU)

Reserved.

PP_DIRB

PP_DIRA

64

63

O

4mA

For direction control, when used with External

IEEE1284 transceivers. Leave it as “NC” if not

used

SCAN_EN

124

I(PD)

Reserved.

NC

55,56,

57,58,

59,61,

62,65,

100,101,

102,103

No Connection

GND

7,20,21,

33, 44,

45,60,

77,88,

94,99,

108,119,

125

Gnd

Power and Signal Ground.

Vcc

1,10,19,

39, 54,

66,82,

89, 104,

114

Pwr

Supply Voltage 5V

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PCI to Dual Parallel Controller

Note: -

In the remaining of this document, a “generic” form of the signal name will be used in the cases where

the same signal name is used with an “A” or “B” suffix.

I.E. both “nSTROBEA” and “nSTROBEB” will be replaced by “nSTROBE”.

The functionality for both Parallel Ports is identical.

I(PU) - Input – Internal Pull Up

I(PD) - Input – Internal Pull Down

O(PU) - Output – Internal Pull Up

OD_O (PU) - Open Drain Output – Internal Pull Up

I/O - - Bi-directional Signal

Pwr - Power

Gnd - Ground

12. Architectural overview

Architecture of MCS9815CV-BA is mainly divided in to three parts

 PCI core

 Parallel Port core

 EEPROM

12.1 PCI Core

12.1.1 PCI Bus Operation

The execution of PCI Bus transactions take place in broadly five stages: address phase; transaction

claiming; data phase(s); final data transfer; and transaction completion.

12.1.2 Address Phase

Every PCI transaction starts with an address phase, one PCI clock period in duration. During the address

phase the initiator (also known as the current Bus Master) identifies the target device (via the address)

and type of transaction (via the command). The initiator drives the 32-bit address onto the Address/Data

Bus and a 4-bit command onto the Command/Byte-Enable Bus. The initiator also asserts the nFRAME

signal during the same clock cycle to indicate the presence of valid address and transaction information

on those buses. The initiator supplies the starting address and command type for one PCI clock cycle.

The target generates the subsequent sequential addresses for burst transfers. The Address/Data Bus

becomes the Data Bus, and the Command/Byte-Enable Bus becomes the Byte-Enable Bus for the

remainder of the clock cycles in that transaction. The target latches the address and command type on

the next rising edge of PCI clock, as do all other devices on that PCI bus. Each device then decodes the

address and determines whether it is the intended target, and also decodes the command to determine

the type of transaction.

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PCI to Dual Parallel Controller

12.1.3 Claiming the transaction

When a device determines that it is the target of a transaction, it claims the transaction by asserting

nDEVSEL.

12.1.4 Data Phase(s)

The data phase of a transaction is the period during which a data object is transferred between the

initiator and the target. The number of data Bytes to be transferred during a data phase is determined by

the number of Command/Byte-Enable signals that are asserted by the initiator during the data phase.

Each data phase is at least one PCI clock period in duration. Both initiator and target must indicate that

they are ready to complete a data phase. If not, the data phase is extended by a wait state of one clock

period in duration. The initiator and the target indicate this by asserting nIRDY and nTRDY respectively

and the data transfer is completed at the rising edge of the next PCI clock.

12.1.5 Transaction Duration

The initiator, as stated earlier, gives only the starting address during the address phase. It does not tell

the number of data transfers in a burst transfer transaction.

The target will automatically generate the addresses for subsequent Data Phase transfers. The initiator

indicates the completion of a transaction by asserting nIRDY and de-asserting nFRAME during the last

data transfer phase. The transaction does not actually complete until the target has also asserted the

nTRDY signal and the last data transfer takes place. At this point the nTRDY and nDEVSEL are de-

asserted by the target.

12.1.6 Transaction Completion

When all of nIRDY, nTRDY, nDEVSEL, and nFRAME are in the inactive state (high state), the bus is in

idle state. The bus is then ready to be claimed by another Bus Master.

12.1.7 PCI Resource Allocation

PCI devices do not have “Hard-Wired” assignments for memory or I/O Ports like ISA devices do. PCI

devices use “Plug & Play” to obtain the required resources each time the system boots up. Each PCI

device can request up to six resource allocations. These can be blocks of memory (RAM) or blocks of I/O

Registers. The size of each resource block requested can also be specified, allowing great flexibility.

Each of these resource blocks is accessed by means of a Base-Address-Register (BAR). As the name

suggests, this is a pointer to the start of the resource. Individual registers are then addressed using

relative offsets from the Base-Address-Register contents. The important thing to note is: plugging the

same PCI card into different machines will not necessarily result in the same addresses being assigned

to it. For this reason, software (drivers, etc.) must always obtain the specific addresses for the device

from the PCI System.

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Each PCI device is assigned an entry in the PCI System’s shared “Configuration Space”. Every device is

allocated 256 Bytes in the Configuration Space. The first 64 Bytes must follow the conventions of a

standard PCI Configuration “Header”. There are several pieces of information the device must present in

specific fields within the header to allow the PCI System to properly identify it. These include the Vendor-

ID, Device-ID and Class-Code. These three fields should provide enough information to allow the PCI

System to associate the correct software driver with the hardware device. Other fields can be used to

provide additional information to further refine the needs and capabilities of the device.

As part of the Enumeration process (discovery of which devices are present in the system) the Base-

Address-Registers are configured for each device. The device tells the system how many registers (etc.)

it requires, and the system maps that number into the system’s resource space, reserving them for

exclusive use by that particular device. No guarantees are made that any two requests for resources will

have any predictable relationship to each other. Each PCI System is free to use its own allocation

strategy when managing resources.

12.1.8 Multi-Function Devices

ASIX uses the Subsystem-ID field to indicate how many Serial Ports and Parallel Ports are provided by

the current implementation. By changing the data in the Subsystem-ID field, and stuffing only the

appropriate number of external components, the same board could be used for products with either one

or two Ports. The least significant Hexadecimal digit of the Subsystem-ID field indicates the number of

Serial Ports that are currently being provided by the device.

The next higher digit indicates the number of Parallel Ports being provided. The table below shows

several different combinations and the types of Ports that would be enabled. Some ASIX devices provide

Serial Ports, some provide Parallel Ports, and some provide both types of Ports. This field is used as an

aid to the software Drivers, allowing them to easily determine how many of each Port type to configure.

Subsystem-ID

Parallel Ports

Serial Ports

0001

0

1

0010

1

0

0012

1

2

This use of the term “Multi-Function Device” should not be confused with the more generic use of that

term by the PCI System. Each “Function” within a “Unit” (physical device) gets its own Configuration

Space Header. ASIX’s devices do not need this extra layer of complexity, the six Base Address Registers

provided by one PCI “Function” are more than adequate to allocate all of the desired resources.

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PCI to Dual Parallel Controller

12.1.9 PCI Configuration Space Header

Default values for several key fields are shown in the table below.

AD 31-24

AD 23-16

AD 15-8

AD 7-0

Offset(Hex)

Device ID (9815)

Vendor ID (9710)

00

Status

Command

04

Class Code (078000)

Revision ID (01)

08

BIST

Header Type

Latency Timer

Cache Size (08)

0C

Base Address Register (BAR) 0 – “Standard Registers-A” (Y)

10

Base Address Register (BAR) 1 – “Extended Registers-A” (W)

14

Base Address Register (BAR) 2 – “Standard Registers-B” (Y)

18

Base Address Register (BAR) 3 – “Extended Registers-B” (W)

1C

Reserved

20

Reserved

24

Reserved

28

Subsystem ID (0020)

Subsystem Vendor ID (1000)

2C

Reserved

30

Reserved

34

Reserved

38

Max Latency (00)

Min Grant (00)

Interrupt Pin (01)

Interrupt Line

3C

Reserved

Loading Timers

40

EEPROM Register

44

raidreg2

raidreg1

4’h0

Test Bus Sel

16’h9710

48

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PCI to Dual Parallel Controller

Internal Address Select Configuration

The MCS9815 uses two Base Address Registers for each Parallel Port.

These essentially act as internal “Chip Select” logic.

Registers are addressed by using one of the Base Addresses plus an offset.

BAR

I/O Address

Offset

Function

Parallel Port

BAR-0 (Y)

00-07

Standard Parallel Port Registers

1st (A)

BAR-1 (W)

00

Configuration Register A

1st (A)

BAR-1 (W)

01

Configuration Register B

1st (A)

BAR-1 (W)

02

Extended Control Register (ECR )

1st (A)

BAR-2 (Y)

00-07

Standard Parallel Port Registers

2nd (B)

BAR-3 (W)

00

Configuration Register A

2nd (B)

BAR-3 (W)

01

Configuration Register B

2nd (B)

BAR-3 (W)

02

Extended Control Register (ECR )

2nd (B)

12.2 Parallel Port

In computing, a parallel port is a type of physical interface used in conjunction with a cable to connect

separate peripherals in a computer system. In Parallel Port, binary information is transferred in parallel:

each bit in a particular value is sent simultaneously as an electrical pulse across a separate wire, in

contrast to a serial port, which requires each bit to be sent in series over a single wire. The number of

wires and the type of connector on a parallel port can vary.

The IEEE 1284 standard, which is an extension of the legacy unidirectional parallel port, allows for faster

throughput and bi-directional data flow with a theoretical maximum throughput of 4 Megabits per second,

with actual around 2 Megabits per second depending on hardware. The parallel port, as implemented on

the PC, consists of a connector with 17 signal lines and 8 ground lines. The signal lines are divided into

three groups:

 Control (4 lines)

 Status (5 lines)

 Data (8 lines)

As originally designed, the Control lines are used for interface control and handshaking signals from the

PC to the printer. The Status lines are used for handshake signals and as status indicators to do

operations such as paper empty, busy indication and interface or peripheral errors. The data lines are

used to provide data from the PC to the printer, in that direction only. Later implementations of the

parallel port allowed for data to be driven from the peripheral to the PC also.

Parallel port implemented in MCS9815CV-BA is compliant to IEEE 1284 Standard Parallel Port and

supports various IEEE 1284 modes through hardware. Following are the Parallel modes of operation

supported.

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PCI to Dual Parallel Controller

 SPP / Centronics / Compatibility Mode

 Nibble Mode

 Byte Mode (PS/2)

 Enhanced Parallel Port (EPP 1.9)

 Extended Capability Port (ECP) with and without RLE

12.2.1 SPP/Centronics/Compatibility Mode

This mode operates in the forward direction only. The DIR bit is forced to “1” and PD[7:0] are always set

to the output direction. All control signals are under software control. This mode operation is used in most

standard parallel ports on PC’s, for data transfer to printer. Data is placed on the PD[7:0] pins and printer

status is checked via the DSR register. If no error condition is flagged and the printer is not busy,

software toggles the nSTROBE pin to latch the PD[7:0] data into the printer. The printer acknowledges

data receipt pulsing the nACK and BUSY pins.

12.2.2 Nibble Mode

The Nibble mode is the most common way to get reverse channel data from a printer or peripheral. This

mode is usually combined with the SPP mode to create a bi-directional channel. Printer status bits are

used as nibble bits for the reverse channel data. The same status bits are used for each nibble, so

special handshaking is required. When both nibbles have been received, the PC must combine them to

form the intended byte if data.

Bits used for Nibble Mode:

Data Bit

BUSY

Bit-7

PE

Bit-6

SLCT

Bit-5

nFAULT

Bit-4

BUSY

Bit-3

PE

Bit-2

SLCT

Bit-1

nFAULT

Bit-0

12.2.3 Byte Mode (PS/2)

The Byte Mode protocol is used to transfer bi-directional data via the PD[7:0] Pins. The FIFO is not used

in this mode. The direction of the port is controlled with the DIR bit in the DCR register. Byte Mode (PS/2)

uses the same handshaking protocol as SPP Mode for data transfer.

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12.2.4 Extended Capability Port(ECP)

ECP Mode is an advanced mode for communication with printers or peripherals. A 16-Byte FIFO

provides a high performance bi-direction communication path. The following cycle types are provided in

both the forward and reverse directions.

 Data Cycle

 Command Cycle

 Run-Length-Encoding(RLE)

 Channel Address

Run Length Encoding (RLE) provides data compression of up to 64:1. This is particularly useful for

printers and peripherals that transfer raster images with long strings of identical data. In order for RLE to

be enabled, both the Host and Peripheral must support this feature. Channel addressing supports

multiple logical devices within a single physical unit, like Scanner / Fax / Printer in one physical Package.

12.2.5 Enhanced Parallel Port Mode (EPP)

In EPP Mode several control signals are used for different purposes than those described for the default

SPP & PS/2 Modes. The nSLCTIN line is used as an “ADDRESS STROBE” and nAUTOFDX is used as

the Data Strobe signal. The appropriate strobe signal is automatically generated when data is read or

written to one of the EPP specific registers. The nSTROBE is re-defined to indicate whether the current

transfer is a write or read cycle. Separate I/O addresses are defined for “Data” and “Address” access and

when these locations are used, handshaking is performed automatically by the chip.

12.2.6 FIFO Test Mode

In this mode the FIFO can be written and read, but no data will be transmitted to the printer. Whatever

data is in the FIFO may be output on the PD[7:0] Pins, but no control signal will be generated to signal a

transfer is to take place. All the status flags are optional in this mode, so the complete operation of the

FIFO can be observed without actually affecting the external device.

12.2.7 Config A/B Enable Mode

This mode must be selected whenever the Config-A or Config-B registers are accessed. The Config-A

register uses the same I/O Address as the FIFO Register. Only allowing access to the Configuration

Registers when this special Mode is selected prevents the two registers from interfering with each other.

12.2.8 Mode Changes

After hardware reset, PS/2 mode is selected as the default mode. When changing to a different mode, it

is necessary to select mode 000 or 001 first, and then any other desired mode can be selected.

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PCI to Dual Parallel Controller

12.3. External EEPROM

Data is read from the EEPROM immediately after a Hardware Reset, and the values obtained are used to

update the Configuration before the PCI System first sees the device on the Bus. This allows a OEM

Customers to customize the vendor and product ID’s in place of ASIX ID’s. EEPROM can be used to

arrive at different product combination by setting appropriate sub-system ID’s. For this EE-EN (Pin#123)

to be left as No Connect at system level.

If external EEPROM is disabled by connecting the EE-EN (Pin#123) to ground, after hardware reset

default values of configuration are loaded by the ASIC.

Following are main features of Serial EEPROM Interface :

 Supports Serial EEPROM of 1K Bit Size with 16bit communication capability

 Configuration Space contents can be modified through EEPROM

 Changing configuration values, different modes can be selected

Following EEPROM types confirmed at ASIX with MCS9815 :

 Atmel AT93LC46B, AT93C46B

 MICROCHIP 93LC46B, 93AA46B, 93AA46C

 ST Micro Electronics M93C46-WMN

13. Extended Modes through EEPROM

Mode supported by MCS9815 configuration without using external EEPROM.

 PCI to 2 Parallel

By using external EEPROM more Peripheral configurations can be derived with MCS9815, few such

configurations listed below:

 PCI to 1 Parallel

Vendor ID and Product ID customizations can also be implemented in MCS9815, through external

EEPROM. Any change of Vendor ID, Product ID information requires customized device driver.

Note: EEPROM need to be programmed in external EEPROM burner, for all above configuration support

and for customizations.

20

MCS9815

PCI to Dual Parallel Controller

14. EEPROM Contents

Contents of the EEPROM (16-bit), values shown below are for 2P Mode

EEPROM

ADDRESS

LOCATION

HEX

Data

(Word)

Description of Contents

EEPROM

ADDRESS

LOCATION

HEX

Data

(Word)

Description of

Contents

0x00

9815

Device ID(changes

according to mode)

0x20

0000

0x01

0000

0x21

0000

0x02

9710

Vendor ID

0x22

0000

0x03

0000

0x23

0000

0x04

0000

{Intr_mask_reg[15:8],

icg_reg1[7:0]}

0x24

0000

0x05

0000

0x25

0000

0x06

0000

0x26

0000

0x07

0000

0x27

0000

0x08

0780

Class code(23-8)

0x28

0000

0x09

0000

0x29

0000

0x0A

0001

{class code (7-0),

Revision ID }

0x2A

0000

0x0B

0000

0x2B

0000

0x0C

0000

Header

0x2C

0020

Subsystem ID

(Changes

according to mode)

0x0D

0000

0x2D

0000

0x0E

0000

0x2E

1000

Subsystem Vendor

ID

0x0F

0000

0x2F

0000

0x10

0000

ICG_reg2[7:0]

0x30

0000

0x11

0000

0x31

0000

0x12

0000

0x32

0000

0x13

0000

0x33

0000

0x14

0000

0x34

0000

21

MCS9815

PCI to Dual Parallel Controller

EEPROM

ADDRESS

LOCATION

HEX

Data

(Word)

Description of Contents

EEPROM

ADDRESS

LOCATION

HEX

Data

(Word)

Description of

Contents

0x15

0000

0x35

0000

0x16

0000

0x36

0000

0x17

0000

0x37

0000

0x18

0000

0x38

0000

0x19

0000

0x39

0000

0x1A

0000

0x3A

0000

0x1B

0000

0x3B

0000

0x1C

0000

0x3C

0000

{Max_lat[7:0],

Min_gnt [7:0]}

0x1D

0000

0x3D

0000

0x1E

0000

0x3E

0100

Interrupt Pin

0x1F

0000

0x3F

0000

EEPROM Data Configuration Values

Description

EEPROM Address

Location

Word/Byte Data

Device ID

0x00

9815

Vendor ID

0x02

9710

Class code

0x08

0780

Class code Interface

0x0A (Most Significant

Byte)

00

Revision ID

0x0A (Least Significant

Byte)

01

Header

0x0C

(Least Significant Byte)

00

Subsystem ID

0x2C

0020

Subsystem Vendor ID

0x2E

1000

Interrupt pin

0x3E (Most Significant

Byte)

01

22

MCS9815

PCI to Dual Parallel Controller

Description

EEPROM Address

Location

Word/Byte Data

Icg_reg1[7:0]

Inter Character Gap setting

register for UART-A

0x04(Least Significant

Byte)

00 (This value is used to

put the delay between each

character).

Icg_reg2[7:0]

Inter Character Gap setting

register for UART-B

0x10(Least Significant

Byte)

00 (This value is used to

put the delay between each

character).

Intr_mask_reg[15:8]

0x04(Most Significant Byte)

00

Product Type: Subsystem Vendor ID

PCI to 1 Parallel (1P): 0010

PCI to 2 Parallel (2P): 0020

Icg_reg1 & 2 : Inter Character Gap register is used to set Inter Character Gap in multiples of 1bit

duration for UART-A & B Ports

Intr_mask_reg[15:0] : Interrupt Mask Register can be used to mask the interrupt from unused Serial or

Paralle ports.

Register(bit)

Value(Default

for 2S+ 1P)

Description

Intr_mask_reg[8]

0

UART-A Interrupt Mask register. By setting

this bit to “1” interrupts can be disabled

from this Port.

Intr_mask_reg[9]

0

UART-B Interrupt Mask register. By setting

this bit to “1” interrupts can be disabled

from this Port.

Intr_mask_reg[11]

0

Parallel Port Interrupt Mask register. By

setting this bit to “1” interrupts can be

disabled from this Port.

The EEPROM controller reads the least significant byte and then the most significant byte in the 16-bit

format. Therefore, when writing to each address in the EEPROM, the least significant byte must be

written first, followed by the most significant byte. For example, to write 9815 into address 0x00, the value

would be written as 15 98, where 15 is the least significant byte and is written first.

23

MCS9815

PCI to Dual Parallel Controller

15. Electrical Specifications

Absolute Maximum Ratings

Supply Voltage 6 Volts

Voltage at any pin GND - 0.3 V to VCC + 0.3 V

Junction Temperature (Tj) 0 °C to +115 °C

Operating Temperature 0 °C to +70 °C

Storage Temperature -40 °C to +150 °C

ESD HBM (MIL-STD 883E Method 3015-7 Class 2) 2000V

ESD MM (JEDEC EIA/JEDS22 A115-A) 200V

CDM (JEDEC JEDS22 C101-A) 500V

Latch up (JESD No. 78, March 1997) 200 mA, 1.5 x Vcc

Recommended Operating Conditions

Symbol

Parameter

Min

Typ

Max

Unit

Condition

Vcc

Supply Voltage

4.75

5

5.25

V

Vin

Input Voltage

0

Vcc

Icc

Operating Current

70

mA

No Load

24

MCS9815

PCI to Dual Parallel Controller

DC Electrical Characteristics : Ta = 0 to +70 °C, VCC = 4.75 to 5.25 V unless otherwise specified.

Symbol

Parameter

Min

Typ

Max

Unit

Condition

ViL

Input Voltage (Low)

0.3 *Vcc

V

CMOS

ViH

Input Voltage (High)

0.7 *Vcc

V

CMOS

ViL

Input Voltage (Low)

0.8

V

TTL

ViH

Input Voltage (High)

2.0

V

TTL

Vt-

Schmitt Trigger Negative-Going

Threshold Voltage

1.84

V

CMOS

Vt+

Schmitt Trigger Positive-Going

Threshold Voltage

3.22

V

CMOS

Vt-

Schmitt Trigger Negative-Going

Threshold Voltage

1.10

V

TTL

Vt+

Schmitt Trigger Positive-Going

Threshold Voltage

1.87

V

TTL

VoL

Output Voltage (Low)

0.4

V

IoL = 2 to

24 mA

VoH

Output Voltage (High)

3.5

V

IoH = 2 to

24mA

Ri

Input Pull-Up/Pull-Down Resistance

50

KΩ

ViL = 0V or

ViH = Vcc

Thermal Characteristics:

Description

Symbol

Rating

Units

Thermal resistance of junction to case

ΘJC

18.8

°C/W

Thermal resistance of junction to

ambient

ΘJA

43

°C/W

Note:

JA



,

JC



defined as below

JA



=

PTT AJ 

,

JC



=

PTT CJ 

TJ: maximum junction temperature (°C) TA: ambient or environment temperature (°C)

TC: the top center of compound surface temperature (°C) P: input power (watts)

25

MCS9815

PCI to Dual Parallel Controller

16. Mechanical Specifications – QFP 128

26

MCS9815

PCI to Dual Parallel Controller

Revision History

Revision

Date

Comment

0.1

09th May 2008

Initial release

1.0

1st May 2008

“Tentative Data Sheet” text removed in all pages & document version

changed to 1.0

1.1

9th March 2010

Software support updated for Windows 7 and WHQL drivers availability

2.00

2011/08/05

1. Changed to ASIX Electronics Corp. logo, strings and contact

information.

2. Added ASIX copyright legal header information.

3. Modified the Revision History table format.

4. Updated the block diagram in Section 9.

2.01

2012/09/12

1. Added Junction Temperature (Tj) and Thermal Characteristics

information in Section 15.

27

MCS9815

PCI to Dual Parallel Controller

4F, No. 8, Hsin Ann Rd., HsinChu Science Park,

HsinChu, Taiwan, R.O.C.

TEL: 886-3-5799500

FAX: 886-3-5799558

Sales Email: sales@asix.com.tw

Support Email: support@asix.com.tw

Web: http://www.asix.com.tw