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SCH5617C Datasheet, PDF (1/5 Pages) SMSC Corporation – Desktop System Controller Hub with Advanced, 8051C-Based Auto Fan Control | |||
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SCH5617C
Desktop System
Controller Hub with
Advanced, 8051µC-Based
Auto Fan Control
PRODUCT FEATURES
Data Brief
 ACPI 2.0 Compliant
 High Performance 8051
â 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.
â Faster clock speed: 32 MHz vs. 16 MHz in standard
8051.
â Dual Data Pointers
â More Interrupts: Power-Fail, External Interrupt 2,
External Interrupt 3, etc.
â A set of External Memory/Mapped Control Registers
provides the 80C51 core with the ability to directly
control many functional blocks of the SCH5617C.
â 384 Bytes of RAM as part of the 8051 core
â 4k Bytes Data RAM (869 bytes may be used to patch
ROM code)
â Twelve Interrupt Sources
â Watch Dog Timer (WDT)
 PECI Interface
â Supports PECI REQUEST# and PECI AVAILABLE
signalling
 Temperature Monitor
â Monitoring of up to Two Remote Thermal Diodes
â Supports temperature readings from -63 degrees to
+192 degrees
â Supports monitoring of discrete diodes (3904 type
diodes)
â Supports monitoring substrate diodes (45nm &
65nm processor diodes)
â 1/8th degree temperature resolution
â Internal Ambient Temperature Measurement
â Limit Comparison of all Monitored Values
 PROCHOT_IN# Pin
â Mapped into Temperature monitoring interrupt
generation logic
â May be used to adjust fan control limits
â May be configured to force fans on full
 PROCHOT_OUT Pin
 Auto-Fan Control with ProcHot Features
â PWM (Pulse width Modulation) Outputs (3)
â Legacy PWM control dc fan outputs
â High Frequency PWM Options (15kHz up to 30kHz)
â 2 second delayed start-up for PWM outputs
â Fan Tachometer or Lock Rotor Inputs (3)
â Programmable linear automatic fan control based on
temperature
â Acoustic enhancement mode
â ProcHot pins modulate Tmin
â Fan PWM duty cycle is a function in linear mode of
multiple temperatures and ProcHot signals
â 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
â IDE Reset/Buffered PCI Reset Outputs
â Power OK Signal Generation
â Power Sequencing
â Power Supply Turn On Circuitry
â Resume Reset Signal Generation
â Hard Drive Front Panel LED
 2.88MB Super I/O Floppy Disk Controller
â Licensed CMOS 765B Floppy Disk Controller
â Software and Register Compatible with SMSC's
Proprietary 82077AA Compatible Core
â Supports Two Floppy Drives
â Configurable Open Drain/Push-Pull Output Drivers
â Supports Vertical Recording Format
â 16-Byte Data FIFO
â 100% IBM® Compatibility
â Detects All Overrun and Underrun Conditions
â Sophisticated Power Control Circuitry (PCC) Including
Multiple Powerdown Modes for Reduced Power
Consumption
â DMA Enable Logic
â Data Rate and Drive Control Registers
â 480 Addresses, Up to Eight IRQs, and Four DMA
Options
â Enhanced Digital Data Separator
â 2 Mbps, 1 Mbps, 500 Kbps, 300 Kbps, 250 Kbps
Data Rates
â Programmable Pre compensation Modes
SMSC SCH5617C
PRODUCT PREVIEW
Revision 0.7 (12-09-08)
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