Hello Ioannis,

I>>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.<<


Chances are, what is happening, is the 819 has programmable clock speeds.. the default clock speed is (I think) 32K.... And your chip is running just perfect.... Only it is running so slow, you are not giving it enough time to let it do its job. <chuckle> Look under the FAQ, there is a thread on this very thing... You will have to set the internat OSC to 4Mhz to be equivalent to your chip that has a internal OSC of 4MHZ.

Have fun!

Dwayne