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Old NEC CPU date code deciphering?

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ce
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PostPosted: Tue May 01, 2012 8:47 am    Post subject: Old NEC CPU date code deciphering? Reply with quote
Anybody here an expert on NEC date codes? I have D80C35C micro's with codes of K17076-131 and K18816-132.

Thanks!
-Cole
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Neon_WA



Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
PostPosted: Tue May 01, 2012 8:54 am    Post subject: Reply with quote
these may help you
http://www.datamath.org/Datecodes.htm
http://www.edaboard.co.uk/japanese-date-codes-t345869.html

With Japanese ICs sometimes the only way to work this out is by looking at used ones on boards and checking the standard date format chips
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those who understand binary and those who don't. ~Author Unknown
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ce
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PostPosted: Tue May 01, 2012 10:26 am    Post subject: Reply with quote
Thanks, Neon! Very interesting, esp. data codes based on Hirohito's coronation year, which seems to be the case for these chips!


-Cole
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