General Description

IT8718F is a Low Pin Count Interface-based highly integrated Super I/O. The IT8718F provides the most commonly used legacy Super I/O functionality plus the latest Environment Control initiatives, such as H/W Monitor, Fan Speed Controller. The device’s LPC interface complies with Intel “LPC Interface Specification Rev. 1.0”. The IT8718F is ACPI & LANDesk compliant.

The IT8718F features the enhanced hardware monitor providing 3 thermal inputs from remote thermal resistors, or thermal diode or diode-connected transistor (2N3904). The device also provides the ITE innovative intelligent automatic Fan ON/OFF & speed control functions (SmartGuardian) to protect the system, reducing the system noise and power consumption. 

The IT8718F contains the fan speed controller which is responsible to control 3 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 Keyboard Controller.

Feature

l Low Pin Count Interface

l Serial Flash I/F for BIOS

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

    feature

l 8 Pins VID

l SST interface (host/slave)

l PECI interface (host)

l Multi curve for one fan control

l Multi sensor for one fan control

l New PCIRST Circuit

l PC98/99/2001, ACPI & LANDesk Compliant

l Enhanced Hardware Monitor

l Fan Speed Controller

l SmartGuardian Controller

l Single +5V Power Supply

l Two 16C550 UARTs

l IEEE 1284 Parallel Port

l Floppy Disk Controller

l Keyboard Controller

l 48 General Purpose I/O Pins

l Watchdog Timer

l ITE innovative automatic power-failure resume & power

   button debounce

l Serial IRQ Support

l Vbat & Vcch Support

l Single +5V Power Supply

l 128-pin QFP

Data Sheet

IT8718F v0.2

IT8718F v0.3 (Please note that the IT8718F v0.3 is applicable 
to C version and future version.