COMMELL HS-770E - Manual (Page 45)

HS-770(E) User’s Manual GPIO Programming
45
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 29
-o 4E 40 ;enale GPIO function
-o 4E 07
-o 4E 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
-o4F 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 valus 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 W83627THF datasheet.
Notice : All GPIO pin pull-high external resistance requirement