Meric Ozcan wrote: > > Hi there, > I am having this strange problem, hope someone can help > me to understand...I have no hair left on my head :( The first thing I would do is to use a programmer to verify the code in the chip against the hex file after it fails. At least that will give a direction to head in. Possibly too low a value resistor causing the pin to sink too much current when it is output low. -- Best regards Tony http://www.picnpoke.com Email sales@picnpoke.com