Thanks to you, Keith.

From the lab' point of view, everything is here;picstart + , MPlab 6.50, PbP 2.44...and the right crystal.

From the software point the difference is just a little "DEFINE OSC 20" ...

And Further, Melabs has no solution and tell me to use an ADC !!! Just understand my wish was to make simple ...

"Is there a solution " seem to be the good question !!!

Alain