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MS-C72 User’s Manual

Appendix C <Programming GPIO’s>

The GPIO’s 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 2E 87 ;enter configuration

-o 2E 87

-o 2E 07

-o 2F 09 ;enale GPIO function

-o 2E 30

-o 2F 02 ;enable GPIO configuration

-o 2E F0

-o 2F xx ;set GPIO as input/output; set ‘1’ for input,’0’for output

-o 2E F1

-o 2F xx ;if set GPIO’s as output,in this register its value can be set

Optional :

-o 2E F2

-o 2F xx ; Data inversion register ; ‘1’ inverts the current valus of the bits ,’0’

leaves them as they are

-o 2E 30

-o 2F 01 ; active GPIO’s

For further information, please refer to Winbond W83627DHG-P datasheet.

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