From: Tolunay Orkun <tolunay@orkun.us>
To: u-boot@lists.denx.de
Subject: [Fwd: RE: [U-Boot-Users] Incorrect flash ids?]
Date: Tue, 13 Jan 2004 13:20:11 -0600 (CST) [thread overview]
Message-ID: <20415.216.110.51.8.1074021611.squirrel@www.orkun.us> (raw)
Well, there is no end to it. In my previous job, hardware engineer decided
to use 64bit bus for flash so we had 4 of them to make 64bit bus(MPC755).
So, the 32 bit ones is not enough to compare all 4 anyway.
Another perfectly valid (but unusual) scheme is to map 4 devices each in
byte mode. That 4 byte ID read would be different that the stored one if
you wanted to compare them bus wide.
> Because these flashes are 16bit wide and there are usually two of them
(one for high order 16bits and one for the low order 16 bits)
>
>>
>> Actually, it is 0x00180018. So, the question is why duplicate
>> the id in the high and low order 16 bits?
>>
>
next reply other threads:[~2004-01-13 19:20 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-13 19:20 Tolunay Orkun [this message]
2004-01-13 20:09 ` [Fwd: RE: [U-Boot-Users] Incorrect flash ids?] Wolfgang Denk
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