mxisp.a51

来自「8051单片机的LCDTV用户界面程序」· A51 代码 · 共 24 行

;//-------------------------------------------------------------------------------------
;Purpose: entry isp function
;Description:Isp function at address 0x3b. The address is interrupt function location.
;Reference: keil software Cx51 compiler user's guide in Interrupt function p.123
;//--------------------------------------------------------------------------------------

sfr AUXR1 = 0xA2;
sfr PDCON = 0xF8;
sfr EBTCON = 0xEB;
NAME ISP	

?PR?start_ISP?ISP SEGMENT CODE  ;AT 03BH		;start_isp address at 0x3bH 
	PUBLIC	start_ISP
	RSEG    ?PR?start_ISP?ISP
	USING	0
start_ISP:
	MOV    EBTCON,#02H			;/EB = 1 is disable WDT
    	MOV    IE,#0
	MOV    PDCON,#5AH
	MOV    AUXR1,#20H
   	LJMP   0FC00H
	RET  	

	END