SMSC SCH5617 User Manual

SCH5617

Desktop System
Controller Hub with
Advanced, 8051µC-Based
Auto Fan Control

PRODUCT FEATURES

 ACPI 2.0 Compliant
 High Performance 8051

— 2.5X average instruction execution speed improvement

over the entire instruction set; i.e., typical 4-clock
instruction cycle in high-performance 8051 vs. 12-clock
instruction cycle in standard 8051.

— Faster clock speed: 32 MHz vs. 16 MHz in standard

8051.
— Dual Data Pointers
— More Interrupts: Power-Fail, External Interrupt 2,

External Interrupt 3, etc.

— A set of External Memory/Mapped Control Registers

provides the 80C51 core with the ability to directly

control many functional blocks of the SCH5617.
— 384 Bytes of RAM as part of the 8051 core
— 4k Bytes Data RAM (869 bytes may be used to patch

ROM code)
— Twelve Interrupt Sources
— Watch Dog Timer (WDT)

 PECI Interface
 Temperature Monitor

— Monitoring of up to Two Remote Thermal Diodes
— Supports temperature readings from -63 degrees to

+192 degrees

– Supports monitoring of discrete diodes (3904 type

diodes)

– Supports monitoring substrate diodes (45nm &

65nm processor diodes)
— 1/8th degree temperature resolution
— Internal Ambient Temperature Measurement
— Limit Comparison of all Monitored Values

 PROCHOT_IN# Pin

— Mapped into Temperature monitoring interrupt

generation logic
— May be used to adjust fan control limits
— May be configured to force fans on full

 PROCHOT_OUT Pin
 Auto-Fan Control with ProcHot Features

— PWM (Pulse width Modulation) Outputs (3)

– Legacy PWM control dc fan outputs
— High Frequency PWM Options (15kHz up to 30kHz)
— 2 second delayed start-up for PWM outputs
— Fan Tachometer or Lock Rotor Inputs (3)
— Programmable linear automatic fan control based on

temperature

Data Brief

— Acoustic enhancement mode
— ProcHot pins modulate Tmin
— Fan PWM duty cycle is a function in linear mode of

multiple temperatures and ProcHot signals

— PWM Ramp Rate Closed Loop Control

 Internal Ring Oscillator for VTR Powered Logic
 Low Battery Warning
 LED Control
 SMBus Isolation Logic
 Programmable Wake-up Event Interface
 PC2001 Compliant
 General Purpose Input/Output Pins (30 Host

controlled, 16 8051 controlled)

 21 Dedicated Scratchpad registers
 ISA Plug-and-Play Compatible Register Set
 System Management Interrupt
 GLUE Logic

— IDE Reset/Buffered PCI Reset Outputs
— Power OK Signal Generation
— Power Sequencing
— Power Supply Turn On Circuitry
— Resume Reset Signal Generation
— Hard Drive Front Panel LED

 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 Two Floppy Drives
— 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 Addresses, Up to Eight IRQs, and Four DMA

Options
— Enhanced Digital Data Separator

– 2 Mbps, 1 Mbps, 500 Kbps, 300 Kbps, 250 Kbps

Data Rates

– Programmable Pre compensation Modes

SMSC SCH5617 PRODUCT PREVIEW Revision 0.6 (01-09-08)

Desktop System Controller Hub with Advanced, 8051µC-Based Auto Fan Control

 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

 Serial Ports

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

Send/Receive 16-Byte FIFOs
— Programmable Baud Rate Generator

– Supports all standard baud rates up to 115k bps
– Supports non-standard baud rates of 230k and

460k bps
— Modem Control Circuitry
— 480 Address and 15 IRQ Options

ORDER NUMBER:

 Infrared Port

— Multi protocol 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

 LPC Interface

— Multiplexed Command, Address and Data Bus
— Serial IRQ Interface Compatible with Serialized IRQ

Support for PCI Systems
— PME Interface

 Power Good Output
 3.3 Volt I/O
 128 Pin QFP, Lead-Free RoHS Compliant Package

SCH5617-NS FOR 128 PIN, QFP LEAD-FREE ROHS COMPLIANT PACKAGE

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

Copyright © 2008 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 agreem ent 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 pr oducts 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 prior written approval of an Officer of SMSC 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
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Revision 0.6 (01-09-08) 2 SMSC SCH5617

PRODUCT PREVIEW