[SI-LIST] Re: PC Parallel port to 3V3

Hello Ian,

I've used the following buffer IC from TI for parallel port interface
applications:
74LVC16245A

It handles two banks of 8-bits, can drive or receive on either bank
(bi-directional)
and operates at 1.8V to 3.3V.  Its inputs are also 5V compliant, which makes
it nice
for interfacing with the parallel port.

You'll need to verify whether the number of pins are sufficient for your DSP
(probably
so is my guess.)

Regards,
Drew

-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Ian Lewis
Sent: Thursday, March 27, 2003 2:17 AM
To: SI List (E-mail)
Subject: [SI-LIST] PC Parallel port to 3V3



Hello everyone,

I would like to interface a microprocessor bus running from 3.3V to a PC
parallel port. The parallel port outputs on my PC seems to be more-or-less
5V levels. I haven't tried putting a voltage source in and reading the port,
but as there are bound to be lots of different implementations of the port,
I wouldn't want to assume that mine is representative. Has anyone tried to
do this in an application? (successfully or otherwise...) What kind of
buffering did you use?

The bus in question is actually the HPI of a Texas Instruments 55x DSP, in
case anyone's interested.

Thanks in advance,

Ian.

Ian Lewis
Applied Technology UK Ltd

------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

or to administer your membership from a web page, go to:
http://www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field

List archives are viewable at:
                http://www.freelists.org/archives/si-list
or at our remote archives:
                http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu



------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

or to administer your membership from a web page, go to:
http://www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field

List archives are viewable at:     
                http://www.freelists.org/archives/si-list
or at our remote archives:
                http://groups.yahoo.com/group/si-list/messages 
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu

Other related posts: