单片机的程序分析题 请给出答案,谢谢答:1.MOV A,R0 MOV R1,R1 2.MOV 21H,20H 3.MOV A,30H RR A RR A MOV 30H,A 4.MOV A,40H CPL A MOV 40H,A 5.PUSH B 6.MOV DPTR,#3000H MOVX A,@DPTR MOV R0,A 7.CLR A MOV DPTR,4000H MOVC A,@A+DPTR MOV R1,A 8.MOV A,R3 ADD A,R4 MOV R3,A 9.CLR C SUBB ...
单片机汇编,黑板第二题,error出错,不知道错在哪答:汇编文件后缀名是.asm,MOVX @DPTR后面不支持立即数, CJNE后面不支持DPTR。org 0000h jmp Start org 0100h Start:MOV DPTR, #3000H LOOP1:MOV A,#0FFH MOVX @DPTR,A INC DPTR MOV A,DPL CJNE A,#0FFH,LOOP1 MOV DPTR,#3000H MOV A,#00H LOOP2:MOVX @DPTR,A INC DPTR MOV...
有没有要考单片机的 求解答答:第一题:MOV A ,20H ANL A ,#F0H ANL 21H,#0FH ORL 21H,A //21H高4位被替代。MOV A,20H ANL A,#0FH ANL 22H,#F0H ORL 22H,A //22H低4位被替代。第二题:MOV DPTR ,#3000H MOV R0,#40H MOV R1,#20H LOOP:MOV A,@R0 MOVX @DPTR,A INC R0 INC DPTR DJNZ R1,LOOP ...
两道单片机题,手写上传图片,谢谢!答:1、MOV A, 40H ANL A, #0FH SWAP A MOV 4AH, A MOV A, 41H ANL A, #0FH ADD A, 4AH MOV DPTR,#3000H MOVX @DPTR,A END 2、ORG 0000H JMP START ORG 0BH JMP TIMER0 START:MOV TMOD,#01H MOV TH0,#(65536-5000) / 256 MOV TL0,#(65536-5000...