> I'll try this out and get back to the list, but in looking at the Block
diagram for the TX pin, it
> looks to me like the TXEN only enables the SPBRG to go through to the
TSR register.  I'm
> looking on page 110 of  DS30292A the 16f87x reference manual.
>
> I also was unable to find any reference to TXEN tri-stating the output.

I probably should have mentioned this in my earlier post........

It's not in the 16F876 datasheet.   I found the information in the 16C76
datasheet (document # DS30390E, page 106, last sentence of the paragraph
below the grey box).  For some reason, this information was omitted when
they compiled the 16F876 datasheet.  I have a project that originally
used the 16C76 and took advantage of this "feature".  When I made the
transition to the 16F876 everything ran just fine.  I hope this
information helps as well.


Kelly Kohls, N5TLE
Dallas, TX
Email:  kkohls@juno.com  OR  n5tle@qsl.net  OR n5tle@arrl.net
Homepage:  http://www.qsl.net/n5tle/

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