SMSC SCH5617C
PRODUCT PREVIEW
Revision 0.7 (12-09-08)
Data Brief
PRODUCT FEATURES
SCH5617C
Desktop System
Controller Hub with
Advanced, 8051µC-Based
Auto Fan Control
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 SCH5617C.
— 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
— Supports PECI REQUEST# and PECI AVAILABLE
signalling
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
— 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
