是不是这样锁存
ORG 0000H
MOV DPTR,#0FEFFH
MOV A,#89H
MOVX @DPTR,A
LOOP:MOV A,#00100000B
MOV DPTR,#0FEFDH
MOVX @DPTR,A
MOV A,#11110111B
MOV DPTR,#0FEFCH
MOVX @DPTR,A
MOV DPTR,#0FEFFH
MOV A,#00001010B
MOVX @DPTR,A
LCALL DO5MS
MOV A,#00010000B
MOV DPTR,#0FEFDH
MOVX @DPTR,A
MOV A,#11111110B
MOV DPTR,#0FEFCH
MOVX @DPTR,A
MOV DPTR,#0FEFFH
MOV A,#00001000B
MOVX @DPTR,A
LCALL DO5MS
MOV A,#00001000B
MOV DPTR,#0FEFDH
MOVX @DPTR,A
MOV A,#10111111B
MOV DPTR,#0FEFCH
MOVX @DPTR,A
MOV DPTR,#0FEFFH
MOV A,#00000110B
MOVX @DPTR,A
LCALL DO5MS
SJMP LOOP
DO5MS:MOV R6,250
D05MS0JNZ R6,D05MS0
RET
END |