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SCH5617 Datasheet, PDF (1/5 Pages) SMSC Corporation – Desktop System Controller Hub with Advanced, 8051μC-Based Auto Fan Control | |||
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SCH5617
Desktop System
Controller Hub with
Advanced, 8051µC-Based
Auto Fan Control
PRODUCT FEATURES
 ACPI 2.0 Compliant
 PC2001 Compliant
 PECI Interface
 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 (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 (diode or PECI)
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
 Programmable Wake-up Event Interface
 21 Dedicated Scratchpad registers
 ISA Plug-and-Play Compatible Register Set
 System Management Interrupt
 46 General Purpose Input/Output Pins
Data Brief
 GLUE Logic
â Resume Reset Signal Generation
â Power Supply Turn On Circuitry
â Power Sequencing
â Power Good Output
â Power OK Signal Generation
â IDE Reset/Buffered PCI Reset Outputs
â Hard Drive Front Panel LED
â Power LED Control
â SMBus Isolation Logic
 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 Configurational Open Drain/Push-Pull Output Drivers
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 480 Address, Up to Eight IRQ 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
 Keyboard Controller
â 8042 Software Compatible
â Four Open Drain Outputs Dedicated for
Keyboard/Mouse Interface
â Port 92 Support
â Fast Gate A20 and KRESET Outputs
 Serial Ports
â Two Full Function Serial Ports
â High Speed NS16C550A Compatible UARTs with
Send/Receive 16-Byte FIFOs
â Supports 230k and 460k Baud
â Programmable Baud Rate Generator
â Modem Control Circuitry
â 480 Address and 15 IRQ Options
 Infrared Port
â Multi protocol Infrared Interface
â IrDA 1.0 Compliant
â SHARP ASK IR
â 480 Addresses, Up to 15 IRQ
SMSC SCH5617
PRODUCT PREVIEW
Revision 0.5 (05-29-07)
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