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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