From: "Dieter Schneider" <dieter.schneider@berghof.com>
To: "'linux embedded forum'" <linuxppc-embedded@ozlabs.org>
Subject: FW: Mpc5200 and ISP1106/1107 USB transceivers
Date: Fri, 5 Aug 2005 13:00:52 +0200 [thread overview]
Message-ID: <000f01c599ac$f2f36830$33f1ff0a@beint.local> (raw)
[-- Attachment #1: Type: text/plain, Size: 263 bytes --]
Mit freundlichen Grüßen
Berghof Automationstechnik GmbH
i.A. Dieter Schneider
- Entwicklungsingenieur -
http://www.berghof.com
mailto:dieter.schneider@berghof.com
Phone: +49 7121 894-129
Fax: +49 7121 894-100
Adresse:
Harretstr.1 72800 Eningen
Deutschland
[-- Attachment #2: Type: message/rfc822, Size: 1580 bytes --]
From: "Dieter Schneider" <dieter.schneider@berghof.com>
To: <Martin.Krause@tqs.de>
Subject: Mpc5200 and ISP1106/1107 USB transceivers
Date: Thu, 4 Aug 2005 17:14:44 +0200
Hello Mr.Krause,
i made an investigation with Philips 1106/1107 USB transceivers not working
with low speed devices and mpc5200:
-usb 1.1 specification gives a rise/fall time for low speed devices in range
75ns to 300ns.
-"working" devices like Philips PDIUSBP11 have a rise/fall time of aprox.
120ns
-isp1106 / 1107 are in range of 180ns, that's inside usb 1.1 spec, but not
working with mpc5200
So its a problem of mpc5200, not philips 1106/1107 transceivers, who are
inside usb 1.1 spec. Setting transceiver speed pin konstant to High(=high
speed device) let the isp1106/1107 work also with low speed devices, but of
course with high speed rise/fall times (7..20ns). By the way, Phillips
PDIUSBP11 is obsolet. Giving the USB D+/D- an additional capacitive load
(for example 120pF, thats inside usb 1.1 spec ) makes an working Phillips
PDIUSBP11 not working.
Mit freundlichen Grüßen
Berghof Automationstechnik GmbH
i.A. Dieter Schneider
- Entwicklungsingenieur -
http://www.berghof.com
mailto:dieter.schneider@berghof.com
Phone: +49 7121 894-129
Fax: +49 7121 894-100
Adresse:
Harretstr.1 72800 Eningen
Deutschland
reply other threads:[~2005-08-05 11:14 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='000f01c599ac$f2f36830$33f1ff0a@beint.local' \
--to=dieter.schneider@berghof.com \
--cc=linuxppc-embedded@ozlabs.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).