📄 mxisp.a51
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;//-------------------------------------------------------------------------------------
;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
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