EPROM erase times and lifespan

Mark Tapley mtapley at swri.edu
Thu Jan 29 12:46:42 CST 2009

At 12:00 -0600 1/29/09, Jules wrote:
>Presumably more expensive erasers do things in-place - i.e. periodically do a
>blank-check during the erase cycle?

I would be pretty nervous about trying that. Knowing how solar cells 
work, and having seen cosmic-ray induced latchups destroy chips, it 
just seems like begging for trouble putting energetic photons onto a 
powered chip if you don't need to.

Of course, EPROMs are cheap, and experimenting might be fun, but if 
you do this, I'd start with easily replaceable EPROMS.

Shutting off the lamp and doing a blank-check, then turning it back 
on, would work, as would covering the chips with a UV-shade. I don't 
see much problem with that.
						- Mark     210-379-4635
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