Hi

Currently I am using the PIC12CE518 JW package to do
my development work. The chip is designed to operate
over a voltage range of 3V to 5.5V. I wrote a simple
program to blink two LEDs on two I/O pins on a
breadboard with nothing but the PIC chip and its
supporting circuity connected up. However a strange
observation was made. The chip works fine when
supplied with a 4.5V supply and when the supply is
changed to 3.3V, the LEDs dont blink while one of
the LEDs is lit up permanently. Another observation
made is that when operating on a 3.3V supply, when the
PIC is put to sleep, the oscillation circuit still
operates!

A supply of 3.3V is within the operating range but
does it give a different operating result?

hanks


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