Appendix D Programming GPIO’s, GPIO0...GPIO7

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 W83627HG datasheet.

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