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From: Jerry Van Baren <gerald.vanbaren@ge.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] Malformed ARP packets
Date: Fri, 19 Sep 2008 07:57:42 -0400	[thread overview]
Message-ID: <48D393B6.4080204@ge.com> (raw)
In-Reply-To: <4e0b9cb00809190237g4de03791nb4cdcd2a579a3e59@mail.gmail.com>

Remi Lefevre wrote:
> Thank you very much for your clues as I'm stuck on this for almost a week.
> 
> [snip]
>> Is this DIMM memory sticks with using SPD configuration or are the SDRAM
>> chips soldered to the board?
> 
> They are soldered.

Yup, thought so. ;-)

> My SDRAM is a Micron MT48LC16M16A2. My init sequence is exactly the same as
> the one in "freescale/mpc8266ads/mpc8266ads.c" or "sacsng/sacsng.c" that use
> MT48LC8M16A2 , but I checked it anyway.

The SDRAM init sequence is odd, but hard to get wrong because it is 
invariant and there are plenty of working examples.

> My PSDMR values have been given by another product using exactly the same
> board and same HWCR configuration (PLD). But I will check them again.

That is the critical issue: the PSDMR values.  If all else fails, read 
the part number off a chip that is on your board and download the 
datasheet for *that* *exact* part number.  Sometimes manufacturers 
upgrade their parts or hardware makes a "compatible" substitution and 
the timing is different.

[snip]

> Thanks,
> R?mi

You are welcome,
gvb

  reply	other threads:[~2008-09-19 11:57 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-09-18  9:49 [U-Boot] Malformed ARP packets Remi Lefevre
2008-09-19  1:54 ` Jerry Van Baren
2008-09-19  9:37   ` Remi Lefevre
2008-09-19 11:57     ` Jerry Van Baren [this message]
2008-09-19 12:51       ` Remi Lefevre
2008-09-19 13:05         ` Jerry Van Baren

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