Dear all,
I am using a P89C52 for Keyboard reading purpose. I have a problem that when i turn on and off the device(Keyboard) it sometimes reads the keys and sometimes does not. P89C52 has a active high reset, the above problem is solved when i repeatedly reset the microcontroller manually using reset switch. My power on reset circuit is connected Below is the link for reset page 5, values 10ufd and 8.2K and i ve not used the BAW62.
Nick