P1.0、P1.1接兩個(gè)發(fā)光管，INT0接一啟動(dòng)按鍵，啟動(dòng)后兩個(gè)發(fā)光管一亮一滅，亮滅時(shí)間為1s，再按按鍵停止發(fā)光管。

實(shí)驗(yàn)箱晶振：6M

ORG 0000H
AJMP MAIN
ORG 0003H
AJMP INT0
ORG 000BH
AJMP T0

ORG 0030H
MAIN:MOV TMOD,#01H
MOV TH0,#3CH
MOV TL0,#0B0H
SETB EA
SETB EX0
SETB ET0
SETB IT0
CLR TR0
CLR P1.0
CLR P1.1
MOV R7,#0AH
SJMP $

ORG 0200H
INT0:JB TR0,AA
SETB TR0

MOV TH0,#3CH
MOV TL0,#0B0H
MOV R7,#0AH
SETB P1.0
CLR P1.1

RETI
AA:CLR TR0
CLR P1.0
CLR P1.1
RETI

ORG 0300H
T0:MOV TH0,#3CH
MOV TL0,#0B0H
DJNZ R7,BB
CPL P1.0
CPL P1.1
MOV R7,#0AH
BB:RETI