SMSC - SCH5617C - Desktop System Controller Hub with Advanced, 8051μC-Based Auto Fan Control

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SCH5617C

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

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 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 Address, 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 Precompensation Modes
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
Infrared Port
- Multi protocol Infrared Interface
- IrDA 1.0 Compliant
- SHARP ASK IR
- 480 Address, Up to 15 IRQ
Multi-Mode™ Parallel Port with ChiProtect™
- Standard Mode IBM PC/XT®, PC/AT®, and PS/2™ Compatible Bidirectional 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

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