CFI ident problems with AMD chips.

Alice Hennessy ahennessy at
Tue Jan 2 13:53:10 EST 2001

David Woodhouse wrote:

> Hi,
> I've now started using AMD chips. I have a chip which I believe to be a
> 4MiB part with TOP boot blocks. Should be 63*64KiB erase regions followed by
> 8*8KiB erase regions.
> However, the CFI "Erase Block Region" information reports them in the wrong
> order - the 8*8KiB blocks _before_ the 63*64KiB.
> Is there some way to tell the top-boot parts apart from the bottom-boot
> parts?
> --
> dwmw2
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In the Am29DL322D/323D/324D spec, there's  a Top/Bottom Boot Sector Flag at
the end of the Primary Vendor-Specific Extended Query at address 4F (word mode)

where 02 = bottom, 03 = top.   I haven't tried it  yet.


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