SMSC SCH311X PRODUCT PREVIEW Revision 1.1 (06-05-07)
Data Brief
PRODUCT FEATURES
SCH3112, SCH3114, SCH3116
LPC IO with 8042 KBC,
Reset Generation, HWM
and Multiple Serial
Ports
General Features
— 3.3 Volt Operation (SIO Block is 5 Volt Tolerant)
— Low Pin Count Bus (LPC) Interface
— Programmable Wake-up Event (PME) Interface
— PC99, PC2001 Compliant
— ACPI 2.0 Compliant
— Serial IRQ Interface Compatible with Serialized IRQ
Support for PCI Systems
— ISA Plug-and-Play Compatible Register Set
— Four Address Options for Power On Configuration Port
— System Management Interrupt (SMI)
— 40 General Purpose I/O pins
— 6 GPIO with VID compatible inputs
— Support for power button on PS/2 Keyboard
— Security Key Register (32 byte) for Device
Authentication
Watchdog Timer
Resume and Main Power Good Generator
Programmable Clock Output to 16 HZ.
2.88MB Super I/O Floppy Disk Controller
— Licensed CMOS 765B Floppy DiskController
— Supports Two Floppy Drives
— Configurable Open Drain/Push-Pull
— Supports Vertical Recording Format
— 16-Byte Data FIFO
— 100% IBM® Compatibility
— Detects All Overrun and Underrun Conditions
— Sophisticated Power Control Circuitry (PCC) Including
Multiple Powerdown Modes for Reduced Power
Consumption
— DMA Enable Logic
— Data Rate and Drive Control Registers
— 480 Address, Up to Eight IRQ and Four DMA Options
— Support FDD Interface on Parallel Port Pins
Enhanced Digital Data Separator
— 2 Mbps, 1 Mbps, 500 Kbps, 300 Kbps, 250 Kbp Data
Rates
— Programmable Precompensation Modes
Keyboard Controller
— 8042 Software Compatible
— 8 Bit Microcomputer
— 2k Bytes of Program ROM
— 256 Bytes of Data RAM
— Four Open Drain Outputs Dedicated for
Keyboard/Mouse Interface
— Asynchronous Access to Two Data Registers and One
Status Register
— Supports Interrupt and Polling Access
— 8 Bit Counter Timer
— Port 92 Support
— Fast Gate A20 and KRESET Outputs
— Phoenix Keyboard BIOS ROM
Multiple Serial Ports
— SCH3112 - 2 Full Function Serial Ports
— SCH3114 - 4 Full Function Serial Ports
— SCH3116 - 4 Full Function and 2 Four-Pin Serial Ports
— High Speed NS16C550A Compatible UARTs with
— Send/Receive 16-Byte FIFOs
— Supports 230k, 460k, 921k and 1.5M Baud
— Programmable Baud Rate Generator
— Modem Control Circuitry
— 480 Address and 15 IRQ Options
— Support IRQ Sharing among serial ports
— RS485 Auto Direction Control Mode
Infrared Port
— Multiprotocol Infrared Interface
— IrDA 1.0 Compliant
— SHARP ASK IR
— 480 Addresses, Up to 15 IRQ
Multi-Mode™ Parallel Port with ChiProtect™
— Standard Mode IBM PC/XT®, PC/AT®, and PS/2™
Compatible Bi-directional Parallel Port
— Enhanced Parallel Port (EPP) Compatible - EPP 1.7
and EPP 1.9 (IEEE 1284 Compliant)
— IEEE 1284 Compliant Enhanced Capabilities Port
(ECP)
— ChiProtect Circuitry for Protection
— 960 Address, Up to 15 IRQ and Four DMA Options
Hardware Monitor
— Monitor Power supplies (+2.5V, +5V, +12V, Vccp
(processor voltage), VCC, Vbat and Vtr.
— Remote Thermal Diode Sensing for Two External
Temperature Measurements accurate to 1.5oC
— Internal Ambient Temperature Measurement
— Limit Comparison of all Monitored Values
— Programmable Automatic FAN control based on
temperature
— nHWM_INT Pin for out-of-limit Temperature or Voltage
Indication
— Thermtrip signal for over temperature indication
IDE Reset Output and 3 PCI Reset Buffers with
Software Control Capability (SCH3112 and SCH3114
Only)
Power Button Control and AC Power Failure
Recovery (SCH3112 and SCH3114 Only)
Temperature Range Available
— Industrial (+85°C to -40°C)
— Commercial (+70°C to 0°C)
128 Pin VTQFP Lead-fre e RoHS Compliant Package
ORDER NUMBERS:
SCH3112i-NU FOR 128 PIN, VTQFP PACKAGE (LEAD-FREE, ROHS COMPLAINT - INDUSTRIAL TEMPERATURE RANGE)
SCH3114i-NU FOR 128 PIN, VTQFP PACKAGE (LEAD-FREE, ROHS COMPLAINT - INDUSTRIAL TEMPERATURE RANGE)
SCH3116i-NU FOR 128 PIN, VTQFP PACKAGE (LEAD-FREE, ROHS COMPLAINT - INDUSTRIAL TEMPERATURE RANGE)
SCH3112-NU FOR 128 PIN, VTQFP PACKAGE (LEAD-FREE, ROHS COMPLAINT - COMMERCIAL TEMPERATURE RANGE)
SCH3114-NU FOR 128 PIN, VTQFP PACKAGE (LEAD-FREE, ROHS COMPLAINT - COMMERCIAL TEMPERATURE RANGE)
SCH3116-NU FOR 128 PIN, VTQFP PACKAGE (LEAD-FREE, ROHS COMPLAINT - COMMERCIAL TEMPERATURE RANGE)
80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123
Copyright © 2007 SMSC or its subsidiaries. All rights reserved.
Circuit diagrams and o ther information relati ng to SMSC products are in cluded as a means of illu strating typical applications. Conse quently, complete information sufficient for
construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC
reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications
before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent
rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated
version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may contain design defects or errors
known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not
designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property
damage. Any and all such uses without p rior written approval of an Officer of SMS C and further testing and /or modification will be fully at the risk of the customer. Copies of
this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC’s website at http://www.smsc.com. SMSC is a registered
trademark of Standard Microsystems Corporation (“SMSC”). Product names and company names are the trademarks of their respective holders.
SMSC DISCLAIMS AN D EX CLU DES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY A ND ALL IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE , AND AGAINST INFRINGEMENT AND THE LIKE, AND ANY AND ALL WARRANTIES ARIS ING FROM ANY COURSE
OF DEALING OR USAGE OF TRADE. IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT, S PECIAL, PUNITIVE, OR CONSEQUENTIAL
DAMAGES; OR FOR LOST DATA, PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON CONTRACT;
TORT; NEGLIGENCE OF SMSC OR OTHERS; STRICT LIAB ILITY; BREACH OF WARRANTY; OR OTHERWISE; WHETHER OR NOT ANY REMEDY OF BUYER IS HELD
TO HAVE FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
Revision 1.1 (06-05-07) 2 SMSC SCH311X
PRODUCT PREVIEW
LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
SMSC SCH311X 3 Revision 1.1 (06-05-07)
PRODUCT PREVIEW
General Description
The SCH3112/SCH3114/SCH3116 Product Family is a 3.3V (Super I/O Block is 5V tolerant)
PC99/PC2001 compliant Super I/O controller with an LPC interface. The SCH3112/SCH3114/SCH3116
Product Family also includes Hardware Monitoring capabilities, enhanced Security features, Power
Control logic and Motherboard Glue logic.
The SCH3112/SCH3114/SCH3116 Product Family's hardware monitoring capability includes
temperature, voltage and fan speed monitoring. It has the ability to alert the system of out-of-limit
conditions and automatically control the speeds of multiple fans. There are four analog inputs for
monitoring external voltages of +5V, +2.5V, +12V and Vccp (core processor voltage), as well as internal
monitoring of the SIO's VCC, VTR, and Vbat power supplies. The SCH3112/SCH3114/SCH3116 Product
Family includes support for monitoring two external temperatures via thermal diode inputs and an
internal sensor for measuring ambient temperature. The nHWM_INT pin is impl emented to indicate out-
of-limit temperature, voltage, and FANTACH conditions. The hardware monitoring block of the
SCH3112/SCH3114/SCH3116 Product Family is accessible via the LPC bus. The same interrupt event
reported on the nHWM_INT pin also creates PME wakeup events. A separate THERMTRIP output is
available, which generates a pulse output on a programmed over temperature condition. This can be
used to generate an reset or shutdown indicator to the system.
The hardware monitoring capability also has programmable automatic FAN control. Three fan
tachometer inputs and three pulse width modulator (PWM) outputs are available.
The Motherboard Glue logic includes various power management and system logic including generation
of nRSMRST, a programmable Clock output, and reset generation. The reset generation includes a
watchdog timer which can be used to generate a reset pulse. The width of this pulse is selectable via
an external strapping option.
The SCH3112/SCH3114/SCH3116 Product Family incorporates complete legacy Super I/O functionality
including an 8042 based keyboard and mouse controller, an IEEE 1284, EPP, and ECP compatible
parallel port, multiple serial ports, one IrDA 1.0 infrared ports, and a floppy disk controller with SMSC's
true CMOS 765B core and enhanced digital data separator, The true CMOS 765B core provides 100%
compatibility with IBM PC/XT and PC/AT architectures and is software and register compatible with
SMSC's proprietary 82077AA core. System related functionality, which offers flexibility to the system
designer, General Purpose I/O control functions, and control of two LED's.
The serial ports are fully functional NS1 6550 compatible UARTs that support data rates up to 1.5 Mbps.
There are four, 8 pin Serial Ports and two, 4pin Serial Ports. The reduced pin serial ports have selectable
input and output controls. The Serial Ports contain programmable direction control, which will
automatically Drive nRTS when the Output Buffer is loaded, then Drive nRTS when the Output Buffer
is Empty.
The SCH3112/SCH3114/SCH3116 Product Family is ACPI 1.0/2.0 compatible and therefore supports
multiple low power-down modes. It incorporates sophisticated power control circuitry (PCC), which
includes support for keyboard.
The SCH3112/SCH3114/SCH3 116 Product Family sup ports the ISA Plug-and-Play Standard register set
(Version 1.0a). The I/O Address, DMA Channel and hardware IRQ of each logical device in the
SCH3112/SCH3114/SCH3116 Product Family may be reprogrammed through the internal configuration
registers. There are up to 480 (960 - Parallel Port) I/O address location options, a Serialized IRQ
interface, and Three DMA channels.
LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
Revision 1.1 (06-05-07) 4 SMSC SCH311X
PRODUCT PREVIEW
1. Legacy Blocks include floppy disk, parallel port, watchdog timer and keyboard controller
2. 2 of the 6 serial ports have 4 pin interfaces
Table 1 Device Specific Summary
FUNCTION SCH3112 SCH3114 SCH3116
LPC Bus Interface YES YES YES
Legacy functional
Blocks (1.)YES YES YES
Floppy on Parallel
Port Option YES YES YES
Reset Generator YES YES YES
Serial Ports 246
(2.)
Programmable
Clock Output YES YES YES
IDE / PCI Reset
Outputs YES YES NO
Power Button / AC
Fail Support YES YES NO
GPIOs 40 40 40
GPIO with VID
Compatible Inputs 666
Dedicated GPIOs 16 0 0
Hardware Monitor YES YES YES
LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
SMSC SCH311X 5 Revision 1.1 (06-05-07)
PRODUCT PREVIEW
Block Diagram
Figure 1 SCH311X Block Diagram
LEDs
LED2*
LED1*
Interna l B u s
(Data, Address, and Control lines)
Power Mgmt
CLOCK
GEN
CLKI32
CLOCKI
WDT
32 byte
Security
Key
Register
Power Control
and Recovery
PB_IN#
PS_ON#
SLP_SX#
PB_OUT#
+5VTR_IN
+12V_IN
+2.5V_IN
VCCP_IN
+5V_IN
HVTR
HVSS
Remote1-
Remote1+
Remote2-
Remote2+
FANTACH1
FANTACH2
FANTACH3
PWM1
PWM2
PWM3
nHWM_INT
nTHERMTRIP
Hardware
Monitor
General
Purpose
I/O
VCC
VTR
Vbat
HWN_INT
14.318Mhz
96 Mhz
PCI_RESET#
WDT*
SER_IRQ
PCICLK
LPC
Bus I n terface
SERIAL
IRQ
SMSC
Proprietary
82077
Compatible
Floppydisk
Controller with
Digital Data
Separator &
Write Precom-
pensation
High-Speed
16550A
UART
PORT 1 & 2
Multi-Mode
Parallel Port
with
ChiProtectTM/
AND FDC MUX
Keyboard/Mouse
8042
controller
PCI Reset
Outputs
High-Speed
16550A
UART
PO RT 3& 4
High-Speed
16550A
UART
PORT 5 & 6
TXD1, RXD1
nCTS1, nRTS1
nDSR1, nDTR1
nDCD1, nRI1
TXD2 (IRTX2)
RXD2 (IRRX2)
nCTS2, nRTS2
nDSR2, nDTR2
nDCD2, nRI2
PD[7:0]
BUSY,nSCLTIN
SCLT, PE
nERROR, nACK
nSTROBE, nINIT, nALF
TXD3, RXD3
nCTS3, nRTS3
nDSR3, nDTR3
nDCD3, nRI3
TXD4, RXD4,
nCTS4, nRTS4
nDSR4, nDTR4
nDCD4, nRI4
nIDE_RSTDRV
nPCIRST[1:3]
MCLK, MDAT
A20M,
nKBDRST,
KCLK,KDAT
TXD5, RXD5
nSCIN5
nSCOUT5
TXD6, RXD6
nSCIN6
nSCOUT6
LAD[3:0]
LFRAME#
LDRQ#
PCI_RESET#
nIO_PME
nIO_SMI
nMTR0,
nTRK0,
nINDEX
nWGATE,
nHDSEL,
DRVDEN0*,
nWRTPRT,
nDIR, nSTEP,
nDSKCHG,
nDS0,
nRDATA,
nWDATA
GP10-17
GP21,22,
GP27,
GP30-34,
GP36-37,
GP40, GP 42,
GP44-47,
GP50-57,
GP60-67
SCH3116 ONLY
SCH3114,
SCH3116 ONLY
SCH3112,
SCH3114 ONLY
nFPRST
PWRGD_PS
PWRGD_OUT
Reset
Generation
Watchdog
Timer
nThremtrip
LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
Revision 1.1 (06-05-07) 6 SMSC SCH311X
PRODUCT PREVIEW
Package Outline
Figure 2 128 Pin VTQFP Package Outline; 14x14x1.0 Body, 2mm Footprint
-SEE SPEC FRONT PAGE FOR REVISION HISTORY --
NOTES:
1. ALL DIMENS ION S ARE IN MILLIM E TER.
2. TRUE POSITION SPREAD TOLERANCE OF EACH LEAD IS ± 0.035mm MAXIM U M .
3. DIMENSIONS "D1" AND "E1" DO NOT INCLUDE MOLD PROTRUSIONS. MAXIMUM ALLOWED
PROTRUSION IS 0.25 mm PER SIDE.
4. DIMENSION "L" IS MEASURED AT THE GAUGE PLANE, 0.25mm ABOVE THE SEATIN G PLANE.
5. DETAILS ON PIN 1 IDENTIFIER ARE OPTIONAL BUT MUST BE LOCATED WITHI N THE ZONE
INDICATED.
TO P VI E W
E1/4
D
D1
E1
e
3D1/4
5
STD C OMPLIAN CE
INTERPRET DIM AND TO L PER
ASME Y14.5M - 1994
DWG NUMBER
PRINT WITH "SCALE TO FIT"
DO NOT SCALE DRAWING
MATERIAL
FINISH
APPROVED
CHECKED
DRAWN
SCALE SHEET
REV
80 ARKAY DRIVE
HAUPPAUGE, NY 11788
USA
ANGULAR
UNLES S OTHE RWISE SP ECIFI E D
DIMEN SIONS ARE IN MILLIMETERS
AND TOLE R ANCES ARE:
DECIMAL
X.X
X.XX
X.XXX
THIRD ANGLE PRO JEC TION
NAME DATE
TITLE
REVISION DATEDESCRIPTION
REVISION HISTORY
RELEAS ED BY
JEDEC: MS-026 (D)
PACKAGE OUTLINE
1:1
-
-
S.K.ILIEV
S.K.ILIEV
S.K.ILIEV
12/17/04
12/17/04
12/17/04
128 V TQ FP- 14 x1 4x 1. 0m m BO DY -0 .4 mm PI TC H
MO-128-VTQFP-14x14x1.0
1 OF 1
C
±1°±0.1
±0.05
±0.025
0.25
R1
R2
GAUGE PLANE 0°-7°
4
DETAIL "A"
b
E
2
3
SE E DE T AIL "A"
SIDE VIEW
A2
cA1
ccc C
ASEATING P LANE
C
L
L1
3-D VI EW
