[Wolves] EEprom corruption
wayne at machx.co.uk
Mon Oct 4 13:27:58 BST 2004
----- Original Message -----
From: "Simon Burke" <simon.burke at gmail.com>
To: "Wolverhampton Linux User Group" <wolves at mailman.lug.org.uk>
Sent: Monday, October 04, 2004 12:59 PM
Subject: Re: [Wolves] EEprom corruption
>> Your mostly right, but afaik an eeprom can only be erased in an eraser,
>> in the piece of kit it is fitted too.
>> Likewise can only be programmed by w programmer.
>> So if it is corrupted, it should be corrupted for good - ie the NIC will
>> be able to reprog it.
>> Different case if it is a flash prom.
> Now the other question, how the ...heck did it get corrupted, I
> assumed something along the lines of a surge or something.
As far as I know, to program an EEprom, you apply a voltage to a pin that is
not used in the device and then
apply the data via parallel pins in. So I guess an eprom could be
'programmed' in situ if there was a problem with
the connections on the board to it, or via a surge causing internal
The other alternative is that the chip is not located in its socket/ dry
joint if soldered in properly so that the data being read from it is
corrupt - rather than the eprom itself being bad.
Oh yes, sure its not a UV erasible eprom? Will have a window on the top
covered by a sticker (to stop it being erased by sunlight).
>From my experience with these, its pretty damn hard to get them to lose data
by sunlight, but it us theretically possible.
I have an eprom reader/programmer if you wanted to check the data on the
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