Lowe value will increase the current consumption, but cause the line to
swing faster.

I used 4.7K mainly because that was what I was using for pull-up in the
rest of the circuit.  Power consumption wasn't an issue.  Since the MAX232
will drive the line high or low properly, the only point of concern is
when the 323 is open.  I would expect that you could use a fairly high
reisitor value here, since the line should already be driven high at the
end of the communication packet, and you are simply trying to keep it
high, rather than floating.

--Joe


pic microcontroller discussion list <PICLIST@MITVMA.MIT.EDU> wrote on
04/22/2004 07:00:32 PM:

> Would chaning the resistor value lower/higher the current consumption?
If
> not, than I can use lower valued resistors.
>
> -----Original Message-----
> From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU] On
> Behalf Of Joe Jansen/TECH/HQ/KEMET/US
> Sent: Friday, April 23, 2004 12:17 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PICLIST] [EE:] 2 RS232 connections on 1 RS232 port
>
> I used a 4.7K for my system.  I think that the higher the resistance,
the
> slower your baud rate is going to be.  Best bet is to put it on a scope
and
> try a couple different resistors.  watch for rounding on the corners.
>
> --Joe
>
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