Hi friends,

I have recently completed a project using 89C52, but had to upgrade to 89C55. I have found 89C55WD, and also managed to program it as well, but the chip does not work in the same circuit and same software. I had applied manual RESET, but to no avail.
If anybody has done it (i.e successfuly completed any project using WD), plz help me.
I have used 12 different chips, but no one works, I even programmed WDT registers, and also disabled them as well, but the result was same.

Is there anything special to do except RESET circuit?