Aaeon PCM-QM77 User Manual page 156

2 GP22_ODATA
1 GP21_ODATA
0 GP20_ODATA
GPIO2x Input Status Register-Index 22h
Power-on default [7:0]=xxxx_xxxxb
Bit Name
7 GP27_PSTS
6 GP26_PSTS
5 GP25_PSTS
4 GP24_PSTS
3 GP23_PSTS
GP22_PSTS
2
GP21_PSTS
1
0 GP20_PSTS
The following is a sample code for 8 input
.MODEL SMALL
.CODE
begin:
mov cl,01h
mov al,80h
call CT_I2CWriteByte
call Delay5ms
mov al,00h
Appendix F – Digital I/O Ports
R/W VSB3V
R/W VSB3V
R/W VSB3V
R/W PWR
RO VSB3V
RO VSB3V
RO VSB3V
RO VSB3V
RO VSB3V
RO VSB3V
RO VSB3V
RO VSB3V
GPIO 22 output data.
GPIO 21 output data.
GPIO 20 output data.
Description
Read the GPIO27 data on the pin.
Read the GPIO26 data on the pin.
Read the GPIO25 data on the pin.
Read the GPIO24 data on the pin.
Read the GPIO23 data on the pin.
Read the GPIO22 data on the pin.
Read the GPIO21 data on the pin.
Read the GPIO20 data on the pin.
141