Hello everybody, this is something I've been wondering about for some time
now. Perhaps here is the place to ask, since it's about one of the "inner
secrets of silicon":
Tony Duell wrote:
> The 8751 is the EPROM version of the 8051 microcontroller. It's otherwise
> identical to it.
>
> If it's in a ceramic package with a quartz window, then you can erase it
> like any other EPROM and reprogram it. If it's in the plastic package,
> then it's the OTP version.
If in fact the same die was used in both components, then it's only the
plastic (which is impenetrable to the commonly-used ultra-violet light) that
prevents the OTP variant from being erased and reprogrammed.
However, there are kinds of radiation similar to light which *will*
penetrate the plastic housing...you see where this goes? Will the memory be erased
when you, say, X-ray the OTP component, will it stay unaffected, or is the
thing just going to die?
(just outta curiosity)
Arno Kletzander
--
+++ GMX - Mail, Messaging & more http://www.gmx.net +++
NEU: Mit GMX ins Internet. Rund um die Uhr f?r 1 ct/ Min. surfen!
Received on Wed Jan 22 2003 - 07:04:01 GMT