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[Calcolo]

Hello everybody, I have the passion for solar pocket electronic calculators and the Casio fx-992s is one of my favorite ones. This model was launched on the market in december 1994. I'm looking for the datasheet of its microcontroller (Oki M6712-04A, a 100-pins QFP 4-bits microcontroller) but I'm not able to find it on the web. Someone can help me?

 

 

Thanks,

 

 

Andrea  

[anon34]

As for the datasheet, it seems that the search result is much higher than that of ML610901. Search Google gives those links:

https://www.datasheeticpdf.com/index.php?route=product/product&product_id=8991155&search=M6712-04A    (not directly available)
http://www.chinaicmart.com/series-M67/M6712-04A.html         (service not available)
https://www.jotrin.com/product/parts/M6712_04A               (require an account, not working)
http://www.icpdf.com/en/search.asp?Des=OKI&button2=Search    (not found, but there are similar products. May not be what you want, though.)

Unfortunately, none of them directly have a PDF now.

The fact that the first page link to (use temporary account to get the link)

http://www.oki.com/?filetype=datasheet&kw=M6712-04A

may implies that there used to be a search/download page on OKI home page.

Also, if it is a OKI microcontroller, it may use a nX-U8/100 CPU. There are information about the CPU.

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How could you find out the microcontroller the calculator used?