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Fri, 19 May 2000 20:48:53 +0000 |
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Yup, yer right! (typically)
EPROM- Electrically Programmable Read Only Memory, is not reprogrammable
without the quartz glass in the top of the package. The engineer probably
specified the OTP part to save money (One-Time-Programming). Some people
have went to the extra trouble to allow programming on the board itself,
but that involves extra circuitry, which most people don't want to fool
with putting on, cuz that's why thay make programmers!
Maybe they should switch to using EEPROM, or E2PROM, depending on which
dialect you prefer, which do not need the windows.
I hope those parts aren't soldered into a pcb already!!!
Roger M. Stoops, PCB Designer
Spectra Precision Inc. Ph: 937.233.8921
5475 Kellenburger Rd. 937.233.4574 ext
Dayton, OH 45424-1099 288
USA Fax: 937.233.7511
Member IPC
Designer's Council,
C.I.D.
"Stephen R.
Gregory" To: [log in to unmask]
<SteveZeva@AO cc:
L.COM> Subject: [TN] Question about EPROM's...
Sent by:
TechNet
<[log in to unmask]
ORG>
05/19/00
08:32 PM
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respond to
"TechNet
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Forum.";
Please
respond to
SteveZeva
Hi ya'll!
Gotta dumb question about EPROM's. If you screw-up and program them wrong
(wasn't me! I didn't do it...hehehe), you can't re-program them unless they
have a glass window in the top of them in which to use ultraviolet light to
erase them...right?
We've got some EPROM's from a company called "Waferscale" and I went to
their
web page and searched for the part number we have. They sell windowed and
non-windowed versions. I'm assuming the non-windowed types are a one shot
deal...am I correct?
Thanks!
-Steve Gregory-
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