AMD EMBEDDED MOTHERBOARD LE-363 - Manual (Page 43)

LE-363 User’s Manual System Resources
I/O Port Address Map 43
Appendix D <Programming GPIO’s>
The GPIO can be programmed with the MSDOS debug program using simple
IN/OUT commands. The following lines show an example how to do this.
GPIO0...GPIO7 bit0……bit7
-o 4E 87 ;enter configuration
-o 4E 87
-o 4E 2A
-o 4F FD ;enable GPIO function
-o 4E 07
-o 4F 07 ;enable GPIO configuration
-o 4E F0
-o 4F xx ;set GPIO as input/output; set ‘1’ for input,’0’for output
-o 4E F1
-o 4F xx ;if set GPIO’s as output, in this register its value can be set
Optional :
-o 4E F2
-o 4F xx ; Data inversion register ; ‘1’ inverts the current value of the
bits ,’0’ leaves them as they are
-o 4E 30
-o 4F 01 ; active GPIO’s
For further information ,please refer to Winbond W83627HF datasheet.