I'm troubleshooting a circuit.

I place a PIC (F84A) in the circuit with PORTA and PORTB both set as =
outputs, and all HI.. I measure some pins (with DMM) and I see some pins =
are HI (as expected) and some pins are LO..
I then set allpins LO, and replace the PIC in the circuit.. I find some =
pins are HI, and some are LO..

I then remove the PIC and power up the circuit...
Some pins are HI, some are LO

Questions,
I have lines tied HI with 1K resistors - I should be able to measure the =
swing on the line at the PIC pins?
Ditto with 100K resistors?


HOW sensitive are PICs to static damage? I currently touch the back of the =
PCB when pressing the F84 into the socket.


FWIW, I have built a bare board (nothing but connections for OSC (crystal) =
MCLR, Vcc and Vss... the same PIC in the this board still shows some pins =
HI and LO at the same time, instead of all HI, or all LO as per the =
programming.

I HATE troubleshooting cirucits.!!!!!!!!!!!!!!!!!

Des

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