Hello,
Mr.Jan Waclawek.

we are not using any external memory chip and external watchdog chip.
for to download programme into chip i m using intelligent universal programmer. and i donot know about the verson of bootloader.
also we have connected pull up resister of 10k at port po.


My hardware is working above the 2000h address perfectly.
but now again, my question is i want to store password #AAh value at address 0100H.and then as per to read it.

But it can't do.
pl send me suggestion,fotr to read the data #AAH at address 0100H and send it to port po.

i m waiting for your replay.





My sampe program is here,


DPL EQU 82H
DPH EQU 83H
FCF EQU 0B1H

ORG 0000H

MOV DPTR,#TESTAREA2
LCALL E_RASE ;Routine for to erase data at address 0100H
MOV DPTR,#TESTAREA2
MOV A,#0AAH
LCALL W_RITE ;Routine for to write data #0AAH at address 0100H
MOV DPTR,#TESTAREA2
LCALL R_EAD ;Routine for to read data at address 0100H



ORG 0100H
TESTAREA2:
DB 0,0



ORG 03F00H

MOV 080H,#0FFH
MOV 0A0H,#0FFH

stop:

MOV DPTR,#0100H ;Reading data at address 0100H
CLR A
MOVC A,@A+DPTR
MOV 080H,A
MOV 0A0H,#11111100B

LCALL DELAY
LCALL DELAY

SJMP STOP


E_RASE:

PUSH 0A8H
CLR 0AFH
MOV R1,#08H
ANL FCF,#0FCH ; enable boot sector
LCALL 01FF0H
ORL FCF,#001H ; enable boot sector
POP 0A8H
LCALL DELAY
LCALL DELAY
RET




W_RITE:

PUSH 0A8H
CLR 0AFH
MOV R1,#02H
ANL FCF,#0FCH ; enable boot sector
LCALL 01FF0H
ORL FCF,#001H ; enable boot sector
POP 0A8H
LCALL DELAY
LCALL DELAY
RET




R_EAD:

PUSH 0A8H
CLR 0AFH
MOV R1,#03H
ANL FCF,#0FCH ; enable boot sector
LCALL 01FF0H
ORL FCF,#001H ; enable boot sector
POP 0A8H
LCALL DELAY
LCALL DELAY
RET



DELAY:

MOV R5,#10
LD2: MOV R6,#100
LD1: MOV R7,#100
LD: DJNZ R7,LD
DJNZ R6,LD1
DJNZ R5,LD2
RET


END