APOLLO user manual
Issue G
116
LCD control bits, GPIO1 and GPIO2 data registers
The LCD control bits correspond with those used on most standard LCD character
displays. GPIO1 and GPIO2 are standalone GPIO that are not used by the LCD
interface; the data direction register description describes the configuration of the GPIO.
IO address Bit Description
7 Reserved
6 IOW
5 ENABLE
4 Reserved
3 Reserved
2 GPIO2
1 GPIO1
Base address + 4Ch
0 Reserved
IO address Bit Description
7 Reserved
6 Reserved
5 Reserved
4 Reserved
3 Reserved
2 Reserved
1 Reserved
Base address + 4Dh
0 RS
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