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 unknowen 27c1024 fails writing 1st few addresses

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T O P I C    R E V I E W
acem77 Posted - 06/26/2006 : 23:21:00
i have a unknowen 27c1024(number scratched off) that i blanked once long time ago a wrote to it with a FLEX-700.

now i blanked the chip and it will fail the writting right at the 1st few addresses in a few sec. it always passes the blank test.i have the 9v adapter in use also. i tried a few diff 27c1024 profiles.

other brand 27c1024 plus other random eproms work.


Man is the best computer we can put aboard a spacecraft... and the only one that can be mass-produced with unskilled labor.
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ZLM Posted - 06/28/2006 : 10:09:19
If other brand 27C1024 work, then I'll guess the unknowen 27C1024 may not been erased, or demaged or not a 27c1024 EPROM.

Or need change the tWc and tWp to work.

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