Are 16f628 and 16f628A difference each other?

[paul borgmeier]

Try using a XTAL like you did on 16F628 (if problem stays, then not internal osc problem)

I guess I have assumed he used an external Xtal with the 16F628 version. With the 16F628 internal (see the tolerances), he would surely get framing errors unless he got lucky with a few. He has a shot with the 16F628A internal unless the temperature changes, the voltage fluctuates, etc.

I would like to know if he used the internal on the 16F628?


Paul