RE: {Spam?} RE: [cobalt-users] Intel Flash EEPROM (ROM)

["Phil Beynon" <phil@xxxxxxxxxxxxxxxxxxxxxxxxx>]

> On Tue, 16 Mar 2004, Phil Beynon wrote:
>
> > Some of these EEproms seem to have a (low) number of re-write
> capabilities,
> > this has been seen in other areas such as cable tv / satellite decoders
> > where updates to firmware are often broadcast without user
> intervention and
> > then the box fails. Probably one of the most common failure
> modes on these
> > boxes.
>
> I don't think that is the problem. These EEPROMs have 16 64KB blocks, and
> it looks like only the boot page gets programmed correctly. It looks
> like the Intel EEPROM also has different programming procedure, it is a
> flash file system, whereas I don't thing the AMD is.
>
> Gerald

I have a vauge recollection that on some EEPROMs there is a difference in
the programming tool used for a first time program against an update over an
existing program, it's been a long time since I did that sort of hardware
design / repair.
It's probably worth looking up the spec and app notes on the Intel site for
that chip type as a starting point, there is a good chance the routine is
downloadable from there.

Phil

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