《单片机》读程序题题库.doc

《单片机原理及应用》读程序题题库 四、阅读下列程序，注释并填写指令执行后的结果（每题10分） ORG 0 LJMP START ORG 30H START： MOV RO, #20H MOV Rl,#30H MOV A, RO ADD A, #36H MOV Pl, A INC RO INC R1 ANL A,R1 SWAP A PUSH ACC MOV Pl, A POP B MOV RO, A MOV DPTR, SETB C ADDC A, #0 MOVX ?DPTR, 1、 #220011 A END (R0)二 (Rl) = (Pl) = 2、 (A) = ORG 0 LJMP START ORG 30H MOV SP, #50H MOV R2, #1OH MOV DPTR, 83000H CLR A MOVX @DPTR, A INC DPTR DJNZ R2, LOOP INC DPH INC DPH MOV 20H, #36H SETB OOH MOV A, 20H MOVX ?DPTR, A INC A INC A PUSH ACC XCH A, R2 POP DPH ADD A, #55H PUSH ACC END (R2)二 START： LOOP： (20H) = 0START 0 START 3OH RO, #3OH A,#12H C A, RO ?RO, A A A DPTR, #2000H DPH Pl, A A @DPTR, A A, RO A ACC A ACC (RO) = (30H) = (DPTR)= 3、 ORG LJMP ORG START： MOV MOV SETB ADDC MOV SWAP INC MOV INC MOV INC MOVX XCH RL PUSH RL POP END (A)= (Pl) = 4、 ORG 0 LJMP START ORG 30H START： MOV SP, #50H MOV DPTR, #3000H MOV RO, #20H MOV A, #23H MOV R2, #OFH SETB O1H SETB C ADDC A, ?RO INC RO MOV @RO,A LOOP： DJNZ R2, LOOP SWAP A PUSH ACC INC DPH MOVX @DPTR, A POP B RR A ADD A,B MOV Pl, A END (21H) = (R2) = (A) = ⑻二 (3100H)= START“ ORG 0 LJMP START ORG 30H MOV MOV MOV DPTRU1OOOH AL13H Rn #20H MOV 宪p A RLC A XCH A』⑥RO PUSH ACC POP DPL MOVX ⑥DPTK A DEC A PUSH DPH POP B ADDB MOV pl」 CLR A ADDw END (plT(BT (DPTR) n (Ro) H 6, ORG 0 LJMP START ORG 30H START” MOV MOV MOV MOV SR #50H Kp#20H R2L10H A. #24H Loop” MOV f (20H) H INC RO DJNZ RN Loop SETB OOH SETB C ADDC A? #OOH SWAP A PUSH ACC POP DPH PUSH ACC pop B MOVR2 MOV DPL A MOVB PUSH ACC END (at gn (20H) n (DPTR) n §n 7、 ORG L.JMP ORG 0 START 30H START： MOV DPTR, #21OOH CLR A MOV R1,#3OH SETB C ADDC A, R1 MOV @R1,A PUSH ACC POP DPL RR A MOV RO, A ORL A, #24H MOV Pl, A SWAP A MOV DPH, A MOV B, #02H ADD A,B CLR ACC. 3 SWAP END A (A) = (RO) = (DPTR) (Pl)二 (30H)= 8、 ORG 0 LJMP START ORG 3OH START： MOV SP, #50H MOV R3,#10H CLR A MOV RO, #20H LOOP： MOV ?RO, A INC RO D.JNZ R3, LOOP SETB OOH SETB C SUBB A,#OOH MOV DPL, A PUSH ACC MOV A, R3 MOV DPH, A POP ACC MOVX @DPTR, A ANL A, #55H PUSH ACC CLR A EN