... LED23LED10LED11LED12LED13LED20LED21LED22LEDLEDLED13LED10LED11LED12LED23LED20LED21LED22XTAL218XTAL119ALE30EA31PSEN29RST9P0.0/AD039P0.1/AD138P0.2/AD237P0.3/AD336P0.4/AD435P0.5/AD534P0.6/AD633P0.7/AD732 P1. 01 P1. 12 P1. 23 P1. 34 P1. 45 P1. 56 P1. 67 P1. 78P3.0/RXD10P3.1/TXD11P3.2/INT012P3.3/INT113P3.4/T014P3.7/RD17P3.6/WR16P3.5/T115P2.7/A1528P2.0/A821P2.1/A922P2.2/A1023P2.3/A1124P2.4/A1225P2.5/A1326P2.6/A1427U1AT89C51X1CRYSTALC133pC233pR1330RR2330RR3330RR4330RR5330RR6330RR7330RR8330RR9330RR10330RR11330RR12330RR13330RR14330RR15330RR16330RR17330RR18330RR19330RR20330RR21330RR22330RR23330RR24330R+5VD1LED-YELLOWD2LED-YELLOWD3LED-YELLOWD4LED-YELLOWD5LED-YELLOWD6LED-YELLOWD7LED-YELLOWD8LED-YELLOW+5VQ1PNPR251k+5VA7QA13B1QB12C2QC11D6QD10BI/RBO4QE9RBI5QF15LT3QG14U47447+5VR26330RR27330RR28330RR29330RR30330RR31330RR32330R+5VA7QA13B1QB12C2QC11D6QD10BI/RBO4QE9RBI5QF15LT3QG14U27447+5VR33330RR34330RR35330RR36330RR37330RR38330RR39330R+5V ... ; START WITH COLUMN 0 MOV R6,#4 ; USE R6 AS COUNTER TEST: MOV P1, A ; ACTIVE COLUMN LINE MOV R7,A ; SAVE ACC MOV A ,P1 ; READ BACK PORT 0 ANL A,#0F0H ; ISOLATE ROW LINES CJNE A,#0F0H,KEY_HIT ... MIDE–51 và nh5p +o)n ch ∀ng trình sau rΟi th:c hi9n ch)y mô ph∋ng m)ch dùng ISIS. MAIN: MOV P1, #25H MOV P0, #0AAH MOV P3, #00010010B JMP $ END Nhi m vΓ. § Quan sát hi9n t ∆ng xu/t...