NEXCOM NViS 3542 - Manual (Page 133)

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Appendix B: GPI/O Programming Guide
NViS 3540/3540H/3540P4/3540P8 and NViS 3542/3542H/3542P4/3542P8 User Manual
NISB3500 GPIO
Appendix B: GPI/O Programming guide
PIN Description PIN Description
1 +5V 2 GND
3 GPO24 4 GPI20
5 GPO25 6 GPI21
7 GPO26 8 GPI22
9 GPO27 10 GPI23
IO base address : 800h
Bit0 : GPI20
Bit1 : GP I21
Bit2 : GP I22
Bit3 : GP I23
Bit4 : GPO24
Bit5 : GPO25
Bit6 : GPO26
Bit7 : GPO27
1. Read/Write GPIO data by I/O port 801h