NEXCOM NISE 101 - Manual (Page 71)

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Appendix B: GPI/O Programming Guide
NISE 101 User Manual
A
ppendix
B: Gpi/O p
rOGrAmminG Guide
The NISB101 onboard GPIO function is carried out by the ITE IT8712F I/O
chip. The board uses the IT8712F’s GP20~27 and GP30~37 pins to support
16-channel GPIO interface. The default setup is 8 output channel and 8
input channel.
The I/O decode address are:
Output port: 0x281
Bit[7:0] = GP27~GP20
Input port: 0x281
Bit[7:0] = GP37~GP30
Pin Description Pin Description
1 GPO20 2 GPI30
3 GPO21 4 GPI31
5 GPO22 6 GPI32
7 GPO23 8 GPI33
9 GPO24 10 GPI34
11 GPO25 12 GPI35
13 GPO26 14 GPI36
15 GPO27 16 GPI37
17 Clock 18 Data
19 GND 20 5V