16-6-1-4.asm

51单片机开发与应用技术详解(珍藏版)PPT及源码

		ORG		0000H
		JMP		START
		ORG		1000H
START:	MOV		P0,#00H			;P0端口赋值
		
		MOV		A,#00H
		MOV		DPTR,#1200H
		JMP		@A+DPTR		;变址寻址，跳转至FUN0

TT1:		MOV		A,#02H
		MOV		DPTR,#1200H
		JMP		@A+DPTR		;变址寻址，跳转至FUN1

TT2:		MOV		A,#04H
		MOV		DPTR,#1200H
		JMP		@A+DPTR		;变址寻址，跳转至FUN2

		ORG		1200H 			;程序分支
		AJMP	FUN0
		AJMP	FUN1
		AJMP	FUN2

FUN0:	MOV		P1,#01H	   		;分支0，FUN0
		LJMP	TT1
FUN1:	MOV		P2,#02H			;分支1，FUN1
		LJMP	TT2
FUN2:	MOV		P3,#03H			;分支2，FUN2

		LJMP	START

		END