Quote Originally Posted by achilles03 View Post

Odd that the previous 16f628a worked with the same oscillator on XT. I guess that XT occasionally works for 20Mhz xtals?

Thanks!
Dave

YES !!! It may happend ... I discovered once the "horrible truth" on one of my 16F877 ...

It was working @ 20 Mhz with a XT setting ... next one never wanted to work !!!

Alain