SMSC SCH5027E User Manual

SCH5027E

Super I/O with
Temperature Sensing,
Quiet Auto Fan and
Glue Logic with PECI

PRODUCT FEATURES

 General Features

— 3.3 Volt Operation (SIO Block is 5 Volt Tolerant)
—LPC Interface
— Programmable Wake-up Event Interface
— PC99, PC2001 Compliant
— ACPI 2.0 Compliant
— Multiplexed Command, Address and Data Bus
— Serial IRQ Interface Compatible with Serialized IRQ

Support for PCI Systems
— PME Interface
— ISA Plug-and-Play Compatible Register Set
— 25 General Purpose Input/Output Pins
— System Management Interrupt

 PECI Interface

— Supports PECI REQUEST# and PECI AVAILABLE

signalling

 AC Power Failure Recovery
 Watchdog Timer
 2.88MB Super I/O Floppy Disk Controller

— Licensed CMOS 765B Floppy Disk Controller
— Software and Register Compatible with SMSC's

Proprietary 82077AA Compatible Core
— Supports One Floppy Drive
— Configurable Open Drain/Push-Pull Output Drivers
— 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 Three DMA Options
— Support 3 Mode FDD

 Enhanced Digital Data Separator

— 2 Mbps, 1 Mbps, 500 Kbps, 300 Kbps, 250 Kbps Data

Rates
— Programmable Precompensation Modes

 Serial Ports

— Two Full Function Serial Ports
— High Speed NS16C550A Compatible UARTs with

Send/Receive 16-Byte FIFOs
— Supports 230k and 460k Baud
— Programmable Baud Rate Generator
— Modem Control Circuitry
— 480 Address and 15 IRQ Options

Data Brief

 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 Three DMA Options

 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

 Motherboard GLUE Logic

— IDE Reset Output
— (4) Buffered PCI Reset Outputs with software controlled

reset capability - default transparent
— Front Panel Reset Debouncing and Power Good Signal

Generation
— Power Supply Turn On Circuitry with Support for power

button on PS/2 Keyboard
— Resume Reset Signal Generation
— SMBus Isolation Circuitry (2 sets external and 1 set

internal for Hardware Monitoring Block)
— SMBus 2.0 compliant interface for Hardware Monitoring
— LED Control (2)

 Fan Control

— 5 PWM (Pulse width Modulation) Outputs
— Low frequency and high frequency PWM support
— 6 Fan Tachometer Inputs
— Programmable automatic fan control based on

temperature
— Interrupt Pin for out-of-limit Fantach Events
— Fantach events generate PME’s

SMSC SCH5027E PRODUCT PREVIEW Revision 0.2 (02-11-09)

Super I/O with Temperature Sensing, Quiet Auto Fan and Glue Logic with PECI

 Temperature Monitor

— Monitoring of Two Remote Thermal Diodes
— Processor temperature monitoring by PECI
— Internal Ambient Temperature Measurement
— Limit Comparison of all Monitored Values
— Interrupt Pin for out-of-limit Temperature Indication
— Thermal events generate PME’s
— Configurable offset for internal or external temperature channels.

 Voltage Monitor

— Monitor Power supplies (2 at 1.125V, one at 5V, one each for Vccp, Vbat, VTR, and VCC)
— Limit Comparison of all Monitored Values
— Interrupt Pin for out-of-limit Voltage Indication
— Voltage events generate PME’s

 Security Features

— Security Key Register (32 byte) for Device Authentication

 3 VID (Voltage Identification) Inputs
 Phoenix Keyboard BIOS ROM
 128 Pin QFP, Lead-Free RoHS Compliant Package

ORDER NUMBER:

SCH5027E-NW FOR 128 PIN, QFN LEAD-FREE ROHS COMPLIANT PACKAGE

80 ARKAY DRIVE, HAUPPAUGE, NY 11788 [phone], FAX [phone]

Copyright © 2009 SMSC or its subsidiaries. All rights reserved.

Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, 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 withou t prior written approval of an Officer of S MSC 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.

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TO HAVE FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

Revision 0.2 (02-11-09) 2 SMSC SCH5027E

PRODUCT PREVIEW