Some just take some convincing to 'take' the program - erasing (usually)
sets all the bits on, and programming clears the bits - the more times
it has been erased and the longer it was erased for, the more it takes
to clear the bits
as you say, programming 2 or 3 times will convince it (and can be used
to refresh an eprom with bitrot without erasing it first)
I typically stick a dot with a silver felt tip on the bottom if an eprom
takes several bursts to erase or takes more than one go to program -
then I use them when I know I won't be changing the programming on them
again
if they reach 3 dots, then they go in the bin!
On 15/02/2013 17:47, Matthew Rossiter wrote:
> So, in continuing this discussion on techtoolslist - I found that I was
> only about to program a couple more 2716a's and the rest failed. Then I
> realized that sometimes I had to program them two or three times until
> they finally verified correctly. Has anyone else run into this issue?
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Received on Fri Feb 15 14:48:32 2013
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