Hello,
I checked three 89C52 all giving the same result ,the read and write pin not showing me the low signals

Here is the program I wrote:

CEL BIT P3.2 ;CHIP ENABLE FOR DPRAM.

ORG 0000H
SJMP MAIN

ORG 0030H
MAIN:
MOV DPTR,#0000H
CLR CEL
LOOP1: MOV A,DPL
MOVX @DPTR,A
INC DPL
MOV R0,DPL
CJNE R0,#00H,LOOP1
SETB CEL

ACALL DELAY

CLR CEL
LOOP2: MOVX A,@DPTR
INC DPL
MOV R0,DPL
CJNE R0,#00H,LOOP2
SETB CEL

LOOP6: SJMP LOOP6