SCH5127 Super I/O with Temperature Sensing, Auto Fan Control and Glue Logic Serial Port Product Features - Two Full Function Serial Ports General Features - High Speed NS16C550A Compatible UARTs - 3.3 Volt Operation (Most I/O Pins are 5 Volt with Send/Receive 16-Byte FIFOs Tolerant) - Supports 230k and 460k Baud - LPC Interface - Programmable Baud Rate Generator - PC99, PC2001 Compliant - Modem Control Circuitry - ACPI 2.0 Compliant - 480 Address and 15 IRQ Options - Multiplexed Command, Address and Data Multi-Mode Parallel Port with ChiProtect Bus , PC/AT , and - Standard Mode IBM PC/XT - Serial IRQ Interface Compatible with Serial- PS/2 Compatible Bi-directional Parallel ized IRQ Support for PCI Systems Port - PME Interface - Enhanced Parallel Port (EPP) Compatible - - ISA Plug-and-Play Compatible Register Set EPP 1.7 and EPP 1.9 (IEEE 1284 Compliant) - Programmable Wake-up Event (PME) Inter- - IEEE 1284 Compliant Enhanced Capabilities face Port (ECP) - System Management Interrupt (SMI) - ChiProtect Circuitry for Protection - 30 General Purpose Input/Output Pins - 960 Address, Up to 15 IRQ and Four DMA AC Power Failure Recovery Options Watchdog Timer Capable to Pulse PWRGD Low Keyboard Controller and Change GPO Polarity - 8042 Software Compatible 2.88MB Super I/O Floppy Disk Controller - 8 Bit Microcomputer - Licensed CMOS 765B Floppy Disk Controller - 2k Bytes of Program ROM - Software and Register Compatible with - 256 Bytes of Data RAM Microchip s Proprietary 82077AA Compatible - Four Open Drain Outputs Dedicated for Key- Core board/Mouse Interface - Supports One Floppy Drive - Asynchronous Access to Two Data Registers - Configurable Open Drain/Push-Pull and One Status Register Output Drivers - Supports Interrupt and Polling Access - Supports Vertical Recording Format - 8 Bit Counter Timer - 16-Byte Data FIFO - Port 92 Support - 100% IBM Compatibility - Fast Gate A20 and KRESET Outputs - Detects All Overrun and Underrun Conditions - Phoenix Keyboard BIOS ROM - Sophisticated Power Control Circuitry (PCC) Motherboard GLUE Logic Including Multiple Powerdown Modes for - Resume Reset Signal Generation Reduced Power Consumption - IDE Reset Output - DMA Enable Logic - (4) Buffered PCI Reset Outputs with software - Data Rate and Drive Control Registers controlled reset capability - 480 Address, Up to Eight IRQ and Four DMA - Two 3VSB Gate signal generation for Sus- Options pend to RAM or S3/S5 Wake up dual power - Support 3 Mode FDD plane control Enhanced Digital Data Separator - Front Panel Reset Debouncing and Main - 2 Mbps, 1 Mbps, 500 Kbps, 300 Kbps, 250 3.3V Power Good Signal Generation Kbps Data Rates - Power Supply Turn On Circuitry with Support - Programmable Precompensation Modes for power button on PS/2 Keyboard - Switches for SMBus Isolation or Voltage Translation for DDC to VGA Monitor Circuitry - LED Control (2) - Speaker Input & Output Control 2006 - 2016 Microchip Technology Inc. DS00002081A-page 1SCH5127 Fan Control - LPC compliant interface for Hardware Moni- toring - 3 PWM (Pulse width Modulation) Outputs with High Frequency PWM Support - 3 Fan Tachometer Inputs - Two Programmable automatic fan control thermal zones based on Selectable Tempera- ture Reading - Fan Tachometer Event can generate PME, SMI and/or Speaker Warning Temperature Monitor - Monitoring of Two Remote Thermal Diodes with 3C TYP, 5C MAX Accuracy - Internal Ambient Temperature Measurement - Beta Compensation for Accurate Tempera- ture Sensing on Intel 65nm CPUs - Limit Comparison of all Monitored Values - Thermal Event can generate PME, SMI and/ or Speaker Warning Processor Hot and Thermal Trip Support Voltage Monitor - Monitor Power supplies (V1 IN for +12V, V2 IN for +5V, +2.5V, VCCP, VBAT, +3.3VTR, +3.3VCC, +1.5VTRIP) - Limit Comparison of all Monitored Values - Voltage Event can generate PME, SMI and/or Speaker Warning Intruder Detection Support 8 VID (Voltage Identification) Input/Output Pins VRD revision 10 or 11 Detection 128-Pin QFP (3.9mm footprint) RoHS Compliant Package DS00002081A-page 2 2006 - 2016 Microchip Technology Inc.