INT0P001P0203P0405P0607 STARTSTARTP0706P0504P0302P010P101P1213P1415P1617P2021 INT0STARTP24P24P101P1213P1415P1617 P2021XTAL218XTAL119ALE3031PSN29RST9P0./AD0390.1/138P0.2/AD2370.3/336P0.4/AD4350.5/534P0.6/AD630.7/732P1.011.2P1.231.34P1.451.56P1.671.78P3.0/RXD103.1/T1P3.2/IN0123./IT113P3.4/014P3.7/RD173.6/W163.5/T115P2.7/A1528P2.0/A8212.1/92P2./A10232.3/124P2.4/A12252.5/13262.6/1427U1AT89C51X3MHzC13pC23p R110kC32u OUT121AD B24 A25 C23VREF(+)12(-)16IN31I42IN53I64IN75 START6OUT58EOC7OE9CLOCK10220OUT714615817418OUT319I228IN127I026ALE2U2ADC0879%RV11k 1 2U4:A740U2(CLOCK)+8.8VoltsORG 0000HLJMP MAINORG 0003HLJMP INT_0ORG 0010HMAIN:MOV P2,#00HMOV DPTR,#7FF8HSETB IT0SETB EX0SETB EASETB P2.3NOPCLR P2.3MOVX DPTR,A MOV A,30HLCALL SEG7SETB P2.0 ;实现输出， LED 显示位选MOV P1,ALCALL DIRCLR P2.0SJMP MAINSEG7: MOV DPTR,#TABMOVC A,A+DPTRRETINT_0:SETB P2.4 MOVX A,DPTRMOV B,#51DIV ABMOV 30H,ARETITAB: DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82HDB 0F8H,80H,90H,88H,83H,0C6H,0A1H,86H,8EHDIR: MOV R4,#30DELAY:MOV R5,#00DJNZ R5,$DJNZ R4,DELAYRETEND