Iei-integration IMB-H610A Manual do Utilizador descarregar pdf (Página 182)

IMB-H610 Micro-ATX Motherboard

Page 167

D.1 Introduction

The DIO connector on the IMB-H610 is interfaced to GPIO ports on the Super I/O chipset.

The DIO has both 4-bit digital inputs and 4-bit digital outputs. The digital inputs and digital

outputs are generally control signals that control the on/off circuit of external devices or

TTL devices. Data can be read or written to the selected address to enable the DIO

functions.

NOTE:

For further information, please refer to the datasheet for the Super I/O

chipset.

D.2 DIO Connector Pinouts

PIN NO. DESCRIPTION PIN NO. DESCRIPTION

1 GND 2 +5V

3 DGPO3 4 DGPO2

5 DGPO1 6 DGPO0

7 DGPI3 8 DGPI2

9 DGPI1 10 DGPI0

Table 6-1: Digital I/O Connector Pinouts

D.3 Assembly Language Samples

D.3.1 Enable the DIO Input Function

The BIOS interrupt call INT 15H controls the digital I/O. An assembly program to enable

digital I/O input functions is listed below.

MOV AX, 6F08H

Sets the digital port as input

INT 15H

Initiates the INT 15H BIOS call

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Iei-integration IMB-H610A Manual do Utilizador Página 182