Andy Warren wrote:
>Dan Michaels <PICLIST@MITVMA.MIT.EDU> wrote:
>
>> I was referring to the situation where you are attempting to use an
>> analog-configured pin as a digital output, which is what I thought
>> Tony was asking about ???????????
>
>    Dan:
>
>    That IS what he was asking about, but the problem with
>    analog-in/digital-out pins has nothing to do with "successive"
>    writes; that's an entirely different issue related to capacitance
>    and the fact that I/O Writes happen at the end of an instruction
>    cycle while I/O Reads happen at the beginning of the cycle.
>


Hmmmm, as I understand it, pins configured as analog but used as
digital outputs always "read" as digital "0". Therefore, successive
BSF instructions to a sequence of pins will always clear any pins
that were previously set, regardless of what is connected to them
externally. I thought this was the whole problem Tony was talking
about. No?

This is a different situation from where the pins are configured
as digital, and where they may have caps hanging on them externally,
and where you also use a series of BSF/BCF cmds. Here, the caps will
hold the pins temporarily.

Been there, done both - been burned every which way.
[I think I'll shut-up now].

- danM

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