IT8673F

` PC98/99, ACPI & LANDesk Compliant
   − ISA Plug and Play register set compatible
   − ACPI V. 1.0 and LANDesk 3.1 compliant
   − Supports eight logical devices
   − 16-bit address decoding
   − Three selectable DMA channels
   − PC98/99 I/O solution
   − Supports IRQ sharing
` Fan Controller
   − Provides FAN ON/OFF and speed control
   − Up to 3 programmable Pulse Width Modulation (PWM) FAN control outputs
   − Each PWM output supports 128 steps of PWM modes
   − Up to 3 Fan tachometer inputs
` 2 Serial Ports
   − Supports two standard 16C550 UARTs
   − UART2 also supports IrDA 1.0 (SIR) and ASKIR infrared protocols
   − Supports MIDI baud rate
` IEEE 1284 Parallel Port
   − Standard mode-Bi-directional SPP
   − Enhanced mode-EPP V. 1.7 and EPP V. 1.9 compliant
   − High speed mode-ECP, IEEE 1284 compliant
   − Backdrive current reduction
   − Printer power-on damage reduction
` Floppy Disk Controller
   − Enhanced digital data separator
   − Drives A and B can be logically swapped via registers
   − 3-Mode drive supported
   − Supports automatic write protection via software
   − Supports two 360K/720K/1.2M/1.44M/2.88M floppy disk drives
` Keyboard Controller
   − 8042 compatible
   − 2KB programmable ROM
   − 256-byte data RAM
   − GateA20 and Keyboard reset output
   − Supports keylock function (Thru GPIO)
   − Supports PS/2 mouse
   − Supports any key, or 2-5 sequential keys, or 1-3 simultaneous keys keyboard power-on feature
   − Supports mouse double-click and/or mouse move power on event
` Consumer Remote Control (TV Remote) IR
` 8 General Purpose I/O Pins
   − Input mode supports either switch de-bounce
   − Output mode supports 2 sets of programmable LED blinking periods
` Chasis Open Detection Support
` Serial IRQ Support
` ITE innovative automatic power-failure resume & power button De-bounce
` Vbat & Vcch Support
` Single 24 MHz or 48 MHz Clock Input
` Single +5V Power Supply
` 128-pin QFP

Applied Voltage................................... -0.5V to 7.0V
Input Voltage (Vi)....................... -0.5V to VCC+0.5V
Output Voltage (Vo)................. -0.5V to VCC + 0.3V
Operation Temperature (Topt)........... 0°C to +70°C
Storage Temperature .................. -55°C to +125°C
Power Dissipation .......................................300mW

.*Comments
Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to this device. These are stress ratings only.Functional operation of this device at these or any other conditions above those indicated in the operational sections of this specification is not implied or intended. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability.

The IT8673F is an ISA-based highly integrated I/O device. The IT8673F provides all the functions required by legacy Super I/O and FAN Controller functionalities. The IT8673F meets the "Microsoft^® PC98/99 system design guide" requirements and is ACPI and LANDesk compliant.

The IT8673F has integrated eight logical devices, featuring an FAN Controller. The fan speed controller is responsible to control three fan speeds through three 128 steps of Pulse Width Modulation (PWM) output pins and to monitor three fans' tachometer inputs.

Other features include a high-performance 2.88MB floppy disk controller with digital data separator, which is able to support two 360K/720K/1.2M/1.44M/2.88M floppy disk drives. One multi-mode high-performance parallel port features the bi-directional Standard Parallel Port (SPP), the Enhanced Parallel Port (EPP, V.1.7 and V.1.9 are supported), and the IEEE1284 compliant Extended Capabilities Port (ECP). Two 16C550 standard compatible enhanced UARTs perform asynchronous communication with enhanced wireless IrDA 1.0 or ASKIR protocols. One Consumer IR controller supports multiple remote control IR protocols. The I/O device also has an integrated 8042 compatible Keyboard Controller with 2KB of programmable ROM for customer application.

These eight logical devices can be individually enabled or disabled via software configuration registers. The IT8673F utilizes power-saving circuitry to reduce power consumption and once a logical device is disabled the inputs are gated, the outputs are tri-state and the input clock is disabled. The IT8673F requires just a single 24/48 MHz clock input and operates with only single +5V power supply.

The IT8673F is available in 128-pin QFP (Quad Flat package).