Contec bx200 SERIES, Руководство пользователя

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6. Appendix
BX-2x0-DCxxxx, BX-2x0D-DCxxxx User’s manual
103
IN AL,DX
TEST AL,1 ;Check status of input
JZ CHK_RES3
MOV DX,2A0H
IN AL,DX ; Retrun Data = 99H
;================================
;<WDT STOP >
;================================
CHK_CMD7:
MOV
DX,2A4H
IN AL,DX
TEST AL,2 ;Check status of output
JZ CHK_CMD7
MOV DX,2A0H
MOV AL,9aH ; 9ah WDT Stop Command
OUT DX,AL ;
CHK_RES4:
MOV
DX,2A4H
IN AL,DX
TEST AL,1 ;Check status of input
JZ CHK_RES4
MOV DX,2A0H
IN AL,DX ; Retrun Data = 9aH
CAUTION
The timer’s intervals have a tolerance of
±
2 seconds.