PIC16F87 pins seem to be getting crossed over

[mackrackit]

Does this happen with or without the programmer attached?
Analog shut off?

Without seeing the code or schematic it is hard to say.
It is getting the time of year for spooks, so maybe that is it

[The Master]

The programmer is not attached. I have to take the chip out of the circuit to program it (Ive still not tried ICSP yet)

Ive tried adding the 3 lines from my last thread "CMCON = 7, CVRCON = 0, CCP1CON = 0". They have no effect.

I havn't done a schematic for this circuit but the input pin has a 100K pullup resistor and connects to an optoisolator that grounds it. The UART pins are connected to an RS485 chip along with portB.4 for driver/receiver control.

This circuit is actually for that time of year So far there has been a problem with every circuit ive made for it this year. Im still working on the others but i might have to make some other threads soon.

[rsocor01]

Hi,

Try a smaller pullup resistor, something like 4.7K. 100K pullup resistors might be too much. I hope this helps.

Robert

[The Master]

I dont think the pullup resistor is the problem. I want a fairly weak one to make it easy to ground. 100K should be more than enough to pull up any pin on a PIC. Ive used them many times before without a problem and there are 3 others on the same circuit working fine.