DIGITAL-LOGIC AG
SM800/900DK Technical Manual V1.2B
85
13.7.10. Programming the GPIO30/31/34 signals
While the BIOS, the status and direction of this signals may be defined in the BIOS-Settings.
After the BIOS has executed INT19 and bootup the OS, the application may control these signals by
programming the SuperIO.
Example code:
;
Winbond SIO W83627HF GPIO example
;
Attention! Only GPIO30, GPIO31 and GPIO34 are available for user
;
on SM800PCX smartmodule. Changing the state of other GPIOs may
;
give unpredictable behaviour of the system.
;GPIO30 - BIT0 - accessible
;GPIO31 - BIT1 - accessible
;GPIO32 - BIT2 - system
;GPIO33 - BIT3 - system
;GPIO34 - BIT4 - accessible
;GPIO35 - BIT5 - system
;-----------------------------------------------------------------------------------
; Enter the extended function mode
;-----------------------------------------------------------------------------------
MOV DX,2EH
MOV AL,87H
OUT DX,AL
OUT DX,AL
Summary of Contents for SM800/900DK
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