HERE:	MOV	 TL0,#0F2H		
		MOV	 TH0,#0FFH	
		CPL	 P1.5		
		ACALL DELAY		
		SJMP	 HERE		
DELAY:	
		SETB	 TR0		
AGAIN:	JNB	 TF0,AGAIN		
		CLR	 TR0		
		CLR	 TF0		
		RET