Hi PIClist friend,

I have a working 16F877 powered with a 5VDC, with a 20 Mhz quartz.

Powering the same circuit with a 3.5 VDC, the PIC refuse to start.

Looking with a scope on pin 14, the quartz of  20 Mhz, it oscillate with an
amplitude betveen the  0,8 and 1,9 Volt, and on pin 13 a fixed level of  1,2
Volt.

If  I change the quartz with one of 8 Mhz, I obtain a bigger oscillation
signal, mat not suficient to start the PIC.

I have some spare 74HC14 available, it can be useful?

Regards

Leo

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