Eurotech Apollo User Manual page 118

APOLLO user manual
LCD control bits data register
The LCD control bits correspond with those used on most standard LCD character
displays and have the following.
RS – Register Select (Command or Data)
IOW – IO Read/Write
ENABLE – Data enable signal
IO address
Base address + 50h
GPIO1 and GPIO2 registers
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
Base address + 4Dh
118
Bit Description
7 Reserved
6 Reserved
5 Reserved
4 RS
3 IOW
2 ENABLE
1 Reserved
0 Reserved
Bit Description
7 Reserved
6 Reserved
5 Reserved
4 GPIO2
3 Reserved
2 Reserved
1 GPIO1
0 Reserved
Issue G