LS-37L User’s Manual
-33-
Appendix E <Programmable GPIO>
The GPIO’ can be programmed with the MS-DOS debug program using simple
IN/OUT commands.
GPIO
0
1
2
3
4
5
6
7
bit
0
1
2
3
4
5
6
7
-o 4E 87
;enter configuration
-o 4E 87
-o 4E 07
-o 4F 07
;select Logical Device
-o 4E 30
-o 4F 10
;activate GPIO function (The board use GPIO4)
-o 4E F0
-o 4F XX
;set “01” GPIO as input, set “00” GPIO as output
-o 4E F1
-o 4F XX
;if set GPIO as output, this register’s value can be set “00~ FF”
Optional
-o 4E F2
-o 4F XX
;set “01”, the respective bit are inverted (Both input and output)
;set “00”, the respective bit are normal
For further information, please refer to Nuvoton NCT6116D datasheet