IT8712F datasheet(32/189 Pages) ITE

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IT8712F V0.81

IT8712F

Table 5-7. Pin Description of Infrared Port Signals

Pin(s) No.

Symbol

Attribute

Power

Description

RESETCON#/

CIRTX/

GP15

DI/

DOD8/

DIOD8

VCC

Reset Connect # / Consumer Infrared Transmit Output /

General Purpose I/O 15.

• The first function of this pin is Reset Connect #. It

connects to reset button, and also other reset source

on the motherboard.

• The second function of this pin is Consumer Infrared

Transmit Output.

• The Third function of this pin is the General Purpose

I/O Port 1 Bit 5.

• The function configuration of this pin is determined by

programming the software configuration registers.

RSMRST#/

CIRRX/

GP55

DOD8/

DI/

DIOD8

VCCH

Resume Reset # / Consumer Infrared Receive Input /

General Purpose I/O 55.

• The first function of this pin is Resume Reset #. It is

power good signal of VCCH. The high threshold is 4V

± 0.2V, and the low threshold is 3.5V ± 0.2V

• The second function of this pin is Consumer Infrared

Receive Input.

• The Third function of this pin is the General Purpose

I/O Port 5 Bit 5.

• The function configuration of this pin is determined by

programming the software configuration registers.

IRRX/

GP46

DI/

DIOD8

VCCH

Infrared Receive Input / General Purpose I/O 46.

• The first function of this pin is Infrared Receive Input.

• The second function of this pin is the General

Purpose I/O Port 4 Bit 6.

• The function configuration of this pin is determined by

programming the software configuration registers.

IRTX/

GP47

DO8/

DIOD8

VCC

Infrared Transmit Output / General Purpose I/O 47.

• The first function of this pin is Infrared Transmit

output.

• The second function of this pin is the General

Purpose I/O Port 4 Bit 7.

• The function configuration of this pin is determined by

programming the software configuration registers.

Table 5-8. Pin Description of Serial Port 1 Signals

Pin(s) No.

Symbol

Attribute

Power

Description

125

SIN1

VCC

Serial Data Input 1.

This input receives serial data from the communications link.

124

SOUT1/

JP3

DO8/

VCC

Serial Data Output 1.

This output sends serial data to the communications link.

This signal is set to a marking state (logic 1) after a Master

Reset operation or when the device is in one of the Infrared

communications modes.

During LRESET#, this pin is input for JP3 power-on strapping

option

123

DSR1#

VCC

Data Set Ready 1 #.

When the signal is low, it indicates that the MODEM or data

set is ready to establish a communications link. The DSR#

signal is a MODEM status input whose condition can be

tested by reading the MSR register.

122

RTS1#/

JP2

DO8/

VCC

Request to Send 1 #.

When this signal is low, this output indicates to the MODEM

IT8712F Datasheet(PDF) 32 Page - ITE Tech.Inc.

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