LJMP START
ORG 000BH
LJMP Timer0Interrupt;定時器中斷START:
MOV SP,#60H SETB P1.0
LCALL InitTimer0LOOP: NOP
;這可以加另外的代碼 LJMP LOOPInitTimer0://定時器初始化
MOV TMOD,#01H
MOV TH0,#0ECH
MOV TL0,#78H
SETB EA
SETB ET0
SETB TR0
RETTimer0Interrupt:
PUSH DPH
PUSH DPL
PUSH ACC
MOV TH0,#0ECH
MOV TL0,#78H
CPL P1.0;輸出方波
POP ACC
POP DPL
POP DPH
RETIEND