DSPRelated.com
Forums

RE: DSP56F80x Pwm port directly drive Leds or optoc oupler?

Started by Johnson, Jerry October 14, 2002
We are directly driving both leds and optocouplers from the PWM outputs without dificulties.
 
Jerry.
-----Original Message-----
From: hao yuan [mailto:h...@yahoo.com]
Sent: Sunday, October 13, 2002 10:55 PM
To: m...@yahoogroups.com
Subject: [motoroladsp] DSP56F80x Pwm port directly drive Leds or optocoupler?

Hi everybody,

May I use the pwm port with resistors drive the leds
and/or optocouplers directly? I mean without any
buffers as 74ls06 or 74ls07.  The max current of pwm
is 20ma and we can confine the currents 10ma. Is that
ok? or will it do any harm to the whole DSP
performance?

Many thanks



_____________________________________
Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer.  You need to do a "reply all" if you want your answer to be distributed to the entire group.

_____________________________________
About this discussion group:

To Join:  m...@yahoogroups.com

To Post:  m...@yahoogroups.com

To Leave: m...@yahoogroups.com

Archives: http://www.yahoogroups.com/group/motoroladsp

More Groups: http://www.dsprelated.com/groups.php3


">Yahoo! Terms of Service.




Hello folks,

Metrowerks would like to address most of the critical compiler issues with
the 5.0 version of the compiler. We will need to have these submitted in
the next two weeks since many of you have said how important having the
fixes quickly matters.

Please put DSP Critical Bug in the subject line so these can be sorted out
quickly. Also, be sure to include an example that demonstrates the problem.

Send a copy to and blind copy me
do not post to this group as quantity may matter. If twenty people report
the same bug it is much more likely to be fixed than if one person does.

Please do not report something where you simply disagree with how we do it
as a critical bug. Also please do not report something that has a simple
workaround as a critical bug. However we would like these to looked at so
submit them as you would a normal bug.

Metrowerks thanks you for your cooperation and this extra effort so that we
may provide a fix in a timely manner.

Ron