11.1 8位ad转换器adc0809接口.txt

MCS－51单片机应用开发实用子程序.zip

INADC：
SETB 	IT1						
SETB 	EA						
SETB 	EX1
MOV	DPTR,#0FEFFH				
MOV 	A,#00H					
MOVX 	@DPTR,A					
PINTl:
MOV 	DPTR,#0FEFFH				
MOVX 	A,@DPTR					
MOV 	50H,A					
MOV 	A,#00H					
MOVX 	@DPTR,A
RETI