Dean <PICLIST@MITVMA.MIT.EDU> wrote:

> Is there a trick to make the RA4 pin on a 16C84 an output.
> ....
> [When I write a 1 to PORTA.4,] the RA4 pin changes from the LOW to an
> open state, neither HI or LOW

Dean:

That's how the RA4 pin works; it's an open-collector output, so if
you want it to go high, you need to put a pullup resistor (10K works
fine) on it.

-Andy

=== Andrew Warren - fastfwd@ix.netcom.com
=== Fast Forward Engineering - Vista, California
=== http://www.geocities.com/SiliconValley/2499