ORG     0000H
       LJMP    START
       ORG    0030H
START:
       mov     TMOD, #00000101b   ; 方式1,記數(shù)器
       mov     TH0, #0
       mov     TL0, #0
       setb    TR0                ; 開(kāi)始記數(shù)

Loop:
       mov     P0, TL0         
       ljmp    Loop
       

       end