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A.1 DIO Interface Introduction
The DIO connector on the 3307800 is interfaced to GIO ports on the iTE 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 iTE Super
I/O chipset.
A.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
1
Ground
2
VCC
3
XIN0
4
XOUT0
5
XIN1
6
XOUT1
7
XIN2
8
XOUT2
9
XIN3
10
XOUT3
A.3 Assembly Language Samples
Page 102
Super I/O Pin
Super I/O Pin Description
N/A
N/A
N/A
N/A
27 (GP20)
General purpose I/O port 2 bit 0.
23 (GP24)
General purpose I/O port 2 bit 4.
26 (GP21)
General purpose I/O port 2 bit 1.
22 (GP25)
General purpose I/O port 2 bit 5.
25 (GP22)
General purpose I/O port 2 bit 3.
21 (GP26)
General purpose I/O port 2 bit 2
24 (GP23)
General purpose I/O port 2 bit 6
20 (GP27)
General purpose I/O port 2 bit 7.
3307800
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