[ITE TECH. INC.]

General Description

The IT8702F is a Low Pin Count Interface-based highly integrated Super I/O. The IT8702F provides the most commonly used legacy Super I/O functionality plus the Fan Speed Controller and Smart Card Reader Interface. The device’s LPC interface complies with Intel “LPC Interface Specification Rev. 1.0”. The IT8702F is ACPI & LANDesk compliant.

The IT8702F features a PC/SC and ISO 7816 compliant Smart Card Reader. The IT8702F contains one game port which supports 2 joysticks, 1 MIDI port, and 1 Fan Speed Controller. The fan speed controller is responsible to control 5 fan speeds through three 128 steps of Pulse Width Modulation (PWM) output pins and to monitor five FANs’ Tachometer inputs. It also features two 16C550 UARTs, one IEEE 1284 Parallel Port, one Floppy Disk Controller and one 8042 Keyboard Controller.

特性 Features

■ Low Pin Count Interface

? Comply with Intel Low Pin Count Interface Specification Rev. 1.0

? Supports LDRQ#, SERIRQ protocols

? Supports PCI PME# Interfaces

■ ACPI & LANDesk Compliant

? ACPI V. 1.0 compliant

? Register sets compatible with “Plug and Play ISA Specification V. 1.0a”

? LANDesk 3.X compliant

? Supports 12 logical devices

■ EC Controller

? 1 chassis open detection input with low power Flip-Flop backed by the battery

? Watch Dog comparison of all monitored values

? Provides VID0 – VID5 support for the CPU

■ Fan Speed Controller

? Provides fan on-off and PWM control

? Supports 5 programmable Pulse Width Modulation (PWM) outputs

? 128 steps of PWM modes

? Monitors 5 fan tachometer inputs

■ Two 16C550 UARTs

? Supports two standard Serial Ports

? Supports IrDA 1.0/ASKIR protocols

? Supports Smart Card Reader protocols

■ Smart Card Reader

? Compliant with Personal Computer Smart Card (PC/SC) Working Group standard

? Compliant with smart card (ISO 7816) protocols

? Supports card present detect

? Supports Smart Card insertion power-on feature

? Supports one programmable clock frequency, and 7.1 MHz and 3.5 MHz (Default) card clocks

■ Consumer Remote Control (TV remote) IR with power-up feature

■ IEEE 1284 Parallel Port

? Standard mode -- Bi-directional SPP compliant

? Enhanced mode -- EPP V. 1.7 and V. 1.9 compliant

? High speed mode -- ECP, IEEE 1284 compliant

? Back-drive current reduction

? Printer power-on damage reduction

? Supports POST (Power-On Self Test) Data Port

■ Floppy Disk Controller

? Supports two 360K/ 720K/ 1.2M/ 1.44M/ 2.88M floppy disk drives

? Enhanced digital data separator

? 3-Mode drives supported

? Supports automatic write protection via software

■ Keyboard Controller

? 8042 compatible for PS/2 keyboard and mouse

? 2KB of custom ROM and 256-byte data RAM

? GateA20 and Keyboard reset output

? Supports any key, or 2-5 sequential keys, or 1-3 simultaneous keys keyboard power-on events

? Supports mouse double-click and/or mouse move power on events

? Supports Keyboard and Mouse I/F hardware auto-swap

■ Game Port

? Built-in 558 quad timers and buffer chips

? Supports direct connection of two joysticks

■ Dedicated MIDI Interface

? MPU-401 UART mode compatible

■ 38 General Purpose I/O Pins

? Input mode supports either switch de-bounce or programmable external IRQ input routing

? Output mode supports 2 sets of programmable LED blinking periods

■ External IRQ Input Routing Capability

? Provides IRQ input routing through GPIO input mode

? Programmable registers for IRQ routing

■ Watch Dog Timer

? Time resolution 1 minute or 1 second, maximum 255 minutes or 255 seconds

? Output to KRST# when expired

■ ITE innovative automatic power-failure resume and power button de-bounce

■ Dedicated Infrared pins

■ VCCH and Vbat Supported

■ Built-in 32.768 KHz Oscillator

■ Single 24/48 MHz Clock Input

■ +5V Power Supply

■ 128-pin QFP