SCH5617C Desktop System Controller Hub with Advanced, 8051C-Based Auto Fan Control Fan Tachometer or Lock Rotor Inputs (3) Product Features - Programmable linear automatic fan control ACPI 2.0 Compliant based on temperature High Performance 8051 - Acoustic enhancement mode - 2.5X average instruction execution speed - ProcHot pins modulate Tmin improvement over the entire instruction set - Fan PWM duty cycle is a function in linear i.e., typical 4-clock instruction cycle in high- mode of multiple temperatures and ProcHot performance 8051 vs. 12-clock instruction signals cycle in standard 8051. - PWM Ramp Rate Closed Loop Control - Faster clock speed: 32 MHz vs. 16 MHz in Internal Ring Oscillator for VTR Powered Logic standard 8051. Low Battery Warning - Dual Data Pointers LED Control - More Interrupts: Power-Fail, External Inter- SMBus Isolation Logic rupt 2, External Interrupt 3, etc. Programmable Wake-up Event Interface - A set of External Memory/Mapped Control PC2001 Compliant Registers provide the 8051 core with the abil- General Purpose Input/Output Pins (30 Host con- ity to directly control many functional blocks trolled, 16 8051 controlled) of the SCH5617C. 21 Dedicated Scratchpad registers - 384 Bytes of RAM as part of the 8051 core ISA Plug-and-Play Compatible Register Set - 4k Bytes Data RAM (869 bytes may be used System Management Interrupt to patch ROM code) GLUE Logic - Twelve Interrupt Sources - IDE Reset/Buffered PCI Reset Outputs - Watch Dog Timer (WDT) - Power OK Signal Generation o o C to +70 C Operating Temperature Range of 0 - Power Sequencing - Power Supply Turn On Circuitry PECI Interface - Resume Reset Signal Generation - Supports PECI REQUEST and PECI AVAIL- ABLE signaling - Hard Drive Front Panel LED 2.88MB Super I/O Floppy Disk Controller Temperature Monitor - Licensed CMOS 765B Floppy Disk Controller - Monitoring of up to Two Remote Thermal Diodes - Software and Register Compatible with o Microchip s Proprietary 82077AA Compatible - Supports temperature readings from -63 C o Core to +192 C Supports monitoring of discrete diodes (3904 - Supports Two Floppy Drives type diodes) - Configurable Open Drain/Push-Pull Output Supports monitoring substrate diodes (45nm & Drivers 65nm processor diodes) - Supports Vertical Recording Format - 1/8th degree temperature resolution - 16-Byte Data FIFO - Internal Ambient Temperature Measurement - 100% IBM Compatibility - Limit Comparison of all Monitored Values - Detects All Overrun and Underrun Conditions PROCHOT IN Pin - Sophisticated Power Control Circuitry (PCC) - Mapped into Temperature monitoring inter- Including Multiple Powerdown Modes for rupt generation logic Reduced Power Consumption - May be used to adjust fan control limits - DMA Enable Logic - May be configured to force fans on full - Data Rate and Drive Control Registers PROCHOT OUT Pin - 480 Addresses, Up to Eight IRQs, and Four Auto-Fan Control with ProcHot Features DMA Options - PWM (Pulse width Modulation) Outputs (3) - Enhanced Digital Data Separator Legacy PWM control dc fan outputs 2 Mbps, 1 Mbps, 500 Kbps, 300 Kbps, 250 Kbps High Frequency PWM Options (15kHz up to Data Rates 30kHz) Programmable Pre compensation Modes 2 second delayed start-up for PWM outputs 2014 Microchip Technology Inc. DS00001789A-page 1SCH5617C Keyboard Controller temperature sensor or retrieving temperatures from - 8042 Software Compatible external processors that implement the PECI Interface. - 8 Bit Microcomputer This includes support for the PECI REQUEST and - 2k Bytes of Program ROM PECI AVAILABLE signals that are used to assure cor- - 256 Bytes of Data RAM rect operation of PECI when processors enter the C3/ - Four Open Drain Outputs Dedicated for Key- C4 sleep states. This device offers programmable board/Mouse Interface automatic fan control support based on one or more of - Asynchronous Access to Two Data Registers these measured temperatures. There are three pulse and One Status Register width modulation (PWM) outputs with high frequency support as well as three fan tachometer inputs. In addi- - Supports Interrupt and Polling Access - 8 Bit Counter Timer tion, there is support for a PROCHOT IN pin that may - Port 92 Support be used to generate an interrupt, adjust the pro- - Fast Gate A20 and KRESET Outputs grammed temperature limits in the auto fan control Serial Ports logic, or force the PWM outputs on full. There is also a - Two Full Function Serial Ports separate PROCHOT OUT output pin. - High Speed NS16C550A Compatible UARTs The GLUE Logic includes various power management with Send/Receive 16-Byte FIFOs logic including generation of RSMRST and Power OK - Programmable Baud Rate Generator signal generation. There are also four LEDs to indicate Supports all standard baud rates up to 115k bps power status and hard drive activity. Also included is Supports non-standard baud rates of 230k and SMBus Isolation logic, which can be used to isolate 460k bps SMBus signals during power down modes. - Modem Control Circuitry - 480 Address and 15 IRQ Options The part provides 46 General Purpose I/O control pins, Infrared Port which offer flexibility to the system designer. There are - Multi protocol Infrared Interface 21 Scratchpad read/write runtime registers for custom - IrDA 1.0 Compliant use. - SHARP ASK IR The SCH5617C incorporates the following Super I/O - 480 Addresses, Up to 15 IRQ components: a parallel port that is compatible with IBM Multi-Mode Parallel Port with ChiProtect PC/AT architecture, as well as the IEEE 1284 EPP and , - Standard Mode IBM PC/XT PC/AT , and ECP two serial ports that are 16C550A UART compat- PS/2 Compatible Bi-directional Parallel ible a keyboard/mouse controller that uses an 8042 Port micro controller two floppy controllers, which use - Enhanced Parallel Port (EPP) Compatible - Microchip s true CMOS 765B core one infrared port EPP 1.7 and EPP 1.9 (IEEE 1284 Compliant) that is IrDA 1.0 compliant. The true CMOS 765B core - IEEE 1284 Compliant Enhanced Capabilities provides 100% compatibility with IBM PC/XT and PC/ Port (ECP) AT architectures and is software and register compati- - ChiProtect Circuitry for Protection ble with Microchip s proprietary 82077AA core. The - 960 Address, Up to 15 IRQ and Four DMA part also provides a low battery warning circuit. Options The SCH5617C is ACPI 1.0b/2.0 compatible and sup- LPC Interface ports multiple low power-down modes. It incorporates - Multiplexed Command, Address and Data sophisticated power control circuitry (PCC), which Bus includes keyboard and mouse wake-up events. - Serial IRQ Interface Compatible with Serial- ized IRQ Support for PCI Systems The SCH5617C supports the ISA Plug-and-Play Stan- - PME Interface dard register set (Version 1.0a). The I/O Address, DMA Power Good Output Channel and hardware IRQ of each logical device in 3.3 Volt I/O the SCH5617C may be reprogrammed through the 128-Pin QFP RoHS Compliant Package internal configuration registers. There are up to 480 (960 for Standard Mode Parallel Port) I/O address loca- tion options, a Serialized IRQ interface, and four DMA Description channels. The SCH5617C is a 3.3V PC 2001 compliant Super I/ O controller with an LPC interface. All legacy drivers used for Super I/O components are supported making this interface transparent to the supporting software. The LPC bus also supports power management, such as wake-up and sleep modes. The SCH5617C provides temperature monitoring with auto fan control. The temperature monitor is capable of monitoring two external diodes, one internal ambient DS00001789A-page 2 2014 Microchip Technology Inc.