Ian,

My PDA works with the 5/0 volt levels.

I am looking at the 74HCT368 Hex buffer/driver/inverter as the driver. With
it I can switch in/out 2 ports and a couple extra drivers for other things.

John

----- Original Message -----
From: "Ian Bell" <ian@RUFFRECORDS.WORLDONLINE.CO.UK>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Friday, September 26, 2003 8:55 AM
Subject: Re: [EE:] rs232 line into digital I/O port???


> On Friday 26 Sep 2003 4:28 pm, you wrote:
>
> snip
> >
> > I can find out, but will not be able to until Monday or Tuesday.
>
> No problem, I am not in a rush ;-)
>
> >
> > > > The length will be 3 feet. 6ft would be great if possible.
> > >
> > > OK, fairly short then, so as a rough guess we can assume 100pF/yd
cable
> > > capacitance so design for more than 200pf load.
> > >
> > > > Data rate of 9600 is fine, but of course, higher would be nice.
> > >
> > > 9600 is nice and slow so cable capacitance should not be too much of
an
> >
> > issue.
> >
> > > How much higher do you want to go?
> >
> > 14400 would be nice. 19200 would be grand. But 9600 is fine.
> >
>
> OK 19200 is not too high either.  we'll take that as the maximum.
>
> Ian
>
> --
> http://www.piclist.com hint: The PICList is archived three different
> ways.  See http://www.piclist.com/#archives for details.

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads