'Long UV exposure'
|From the MicroChip Classes they said that some chips have a physical metal
shield that protects some part of the eprom space, so that the rest of the
chip is erased, the rest are not. I belive it was the CP bit. Anyway, their
answer was to turn off the compare.
Kevin E. Dodd
Embedded Systems Consulting
2601 NE Jack London #49
Corvallis, Oregon, 97330
On Wednesday, June 18, 1997 1:02 AM, Mark Street
[SMTP:CVHP117.GPT.CO.UK] wrote: streetm
> Actually this is an interesting topic for me because I used to be able to
> a 16C74 in around 15 minutes from new (no Code Protect bit set) now it
> at least
> 25 minutes. Why? Is it the PIC degrading or the UV tube?
> If I accidentally set the CP bit, it takes days to erase!
> Mark Street.
> > I have something to ask (pls forgive me if it's been asked before)
> > I noticed that the newer pics i.e. 16c73's and 16c64's took longer to
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