From: "Eric N. Johnson (ACD)" <ejohnson@acdstar.com>
To: "Stephen Warren" <SWarren@nvidia.com>, <linuxppc-embedded@ozlabs.org>
Subject: RE: New MPC5200 Eratta/ATA Bugs
Date: Mon, 25 Apr 2005 17:00:39 -0500 [thread overview]
Message-ID: <6.2.1.2.1.20050425163431.031d58b0@mail.int.acdstar.com> (raw)
In-Reply-To: <DBFABB80F7FD3143A911F9E6CFD477B00688411F@hqemmail02.nvidia .com>
At 02:35 PM 4/25/2005, Stephen Warren wrote:
>Freescale have been working with us on a board work-around for the
>problem. This basically involves deriving a substitute ATA_ISOLATION
>signal from the regular ATA control signals, in some cases.
Are you able to share the circuit they've recommended? Is it as simple as:
ISOLATION = ((ATA_CS1 or ATA_IOR) and (ATA_CS0 or ATA_IOR))
This seems like it would be in violation of the setup and hold time
requirements for the data bus.
I've been told there's a new silicon revision of the MPC5200 due sometime
later in the year, but the date keeps getting pushed back.
Eric
------------------------------------
Eric Johnson, Electrical Engineer
Advanced Communication Design
7901 12th Avenue South
Bloomington, MN 55425
Ph: 952-854-4000 Fax: 952-854-5774
next prev parent reply other threads:[~2005-04-25 22:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-25 19:35 New MPC5200 Eratta/ATA Bugs Stephen Warren
[not found] ` <DBFABB80F7FD3143A911F9E6CFD477B00688411F@hqemmail02.nvidia .com>
2005-04-25 22:00 ` Eric N. Johnson (ACD) [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-04-25 22:13 Stephen Warren
2005-04-25 19:22 Eric N. Johnson (ACD)
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