128 Pin Enhanced Super I/O Controller with an LPC Interface and USB Hub

FEATURES
3.3 Volt Operation (5 Volt Tolerant)
LPC Interface
ACPI 1.0 Compliant
Fan Control
-  Fan Speed Control Outputs
-  Fan Tachometer Inputs
Programmable Wake-up Event Interface
PC98, PC99 Compliant
Dual Game Port Interface
MPU-401 MIDI Support
General Purpose Input/Output Pins
ISA Plug-and-Play Compatible Register Set
Intelligent Auto Power Management
System Management Interrupt
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 IRQ 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 NS16C550ACompatible UARTs with Send/Receive 16-Byte FIFOs
-  Supports 230k and 460k Baud  Programmable Baud Rate Generator  Modem Control Circuitry
-  480 Address and 15 IRQ Options
Infrared Port
-  Multiprotocol Infrared Interface
-  IrDA 1.0 Compliant
-  SHARP ASK IR
-  480 Addresses, Up to 15 IRQ
Multi-Mode Parallel Port with ChiProtect
-  Standard Mode IBM PC/XT, PC/AT, and PS/2 Compatible Bi-directional 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 
-  960Address, Up to 15 IRQ and Four DMA Options
USB Hub
-  1 Upstream and up to 4 Downstream Ports
-  Compliant with USB Spec. version 1.1
-  Programmable USB Manufacturer ID, Product ID and Device Rev. Number
-  Number of active ports programmable or selectable via jumpers
-  Powered by Vtr for Downstream Port Wakeup
LPC Interface
-  Multiplexed Command, Address and Data Bus
-  Serial IRQ Interface Compatible with Serialized IRQ Support for PCI Systems
- PME Interface
Interrupt Generating Registers
-  Registers Generate IRQ1– 15 on Serial IRQ Interface