Maybe of topic -- interrupt on change + LED

[HW_Newbee]

I have conected LED to all free pins on chip.
and i use normal output_high(), function for each pin.

All LED's are conected on this way:

PIN --> resistor -->LED -->ground

and all are working fine ( lighting ) exept the ones where pin is definied as
Input/output pin (with interrupt-on-change).

Can i change this thru program ( light them programaticly ) or is this HW errror ?

[rwyoung]

Which pin EXACTLY? Some pins (RA4 on PIC16F877A and others) for example are open collector when used as an output.
_________________
Rob Young
The Screw-Up Fairy may just visit you but he has crashed on my couch for the last month!

[treitmey]

And being an open collector it can only pull a signal down. NOT UP. So in that case you have a pull-up resistor on that pin tied to +5.

[Guest]

Im using chip 16C84 and this are the pins where i can't get no output, on LED

pin RB4-RB7 (I/o with interrupt on change)
pin A4 ( output is open drain type ).

It look like that this is my HW error so if i can not use this:

PIN --> resistor -->LED -->ground

i should take your option ?