2804040 User’s Manual

Hardware Test

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 2E 87

;enter configuration

-o 2E 87

 

-o 2E 29

 

-o 2E 40

;enale GPIO function

-o 2E 07

 

-o 2E 07

;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 W83627THF datasheet.

Programming GPIO’s

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Intel 2804040 user manual Appendix D Programming GPIO’s

2804040 specifications

The Intel 2804040 is a powerful and versatile microprocessor that has been a significant player in the realm of computing. Designed for various applications, this processor brings a blend of advanced technologies and features that cater to both power users and everyday consumers.

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