Hi people.

I had a design with ICSP that used 16f628 and all work good.

After uograding to F819 I am facing a strange problem. The new chip cannot be programmed with ICSP. I contacted my programmer manufacturer but could not find any solution. They suggested to connect PGM pin even if it is not used. Microchip does not mention any differencies in ICSP between the two chips.

Any ideas welcome.

Ioannis