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To: "Reeve Yang" <yang.reeve@gmail.com>
Subject: Re: Need help on PPC8343E bringup 
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Date: Fri, 29 Sep 2006 14:33:30 -0700
From: Michael Galassi <mgalassi@c-cor.com>
Cc: linuxppc-embedded@ozlabs.org
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>Hello linux-ppc experts,
>
>I'm trying to use using wind river jtag probe to download uboot to our
>switching box which is with PPC8343E/Intel 28F128J3D memory flash(16M).
>Memory mapping is starting from 0xFF000000 to 0xFFFFFFFF which is 16M. The
>JTAG software I'm using is visionclick8.
>
>The problem now is that I even couldn't erash flash, with following error
>message:
>
>TF ERASE FFF00000..FFFFFFFF INTEL  28F128Jx ( 8192 x 16 )  1 Device
>Erasing Flash(s) ... Failed
>!ERROR! - [msg100000] Failed while erasing the device(s)
>>BKM>
>!HALT! - [msg90009] Target Stopped : CheckStop taken; PC = 0x00007404 [EVENT
>Taken]
>>BKM>
>
>Does anyone has experiece to bring up this CPU, and could shed some lights
>on it? Thank you in advance.
>
>- Reeve

Your flash part[s] are almost certainly write-protected, or part of them
is.  Get the data-sheet for them and find what combination to write to
them to un-protect them and try again.  For the parts I'm using (micron
MT28F128J3) writing 0x00600060 followed by 0x00d000d0 to the part does
the trick.

-michael