IEI Technology PM-PV-D4251, User Manual

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PM-PV-D4251/N4551/D5251 User Manual
Page 121
D.1 Introduction
The DIO connector on the PM-PV-D4251/N4551/D5251 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
The following table describes how the DIO connector pins are connected to the Super I/O
GPIO port 1.
Pin Description Super I/O Pin Super I/O Pin Description
1 Ground N/A N/A
2 VCC N/A N/A
3 Output 3 GP27 General purpose I/O port 2 bit 7.
4 Output 2 GP26 General purpose I/O port 2 bit 6.
5 Output 1 GP25 General purpose I/O port 2 bit 5.
6 Output 0 GP24 General purpose I/O port 2 bit 4.
7 Input 3 GP23 General purpose I/O port 2 bit 3.
8 Input 2 GP22 General purpose I/O port 2 bit 2
9 Input 1 GP21 General purpose I/O port 2 bit 1
10 Input 0 GP20 General purpose I/O port 2 bit 0
Table D-1: Digital I/O Connector Pinouts