μCOM-4
μCOM-4 is a microcontroller family introduced by NEC in the 1970s. It was manufactured as Sharp requested them for their products. It had a 4-bit architecture. It was based on the μPD751 microprocessor, the first Japanese single-chip microprocessor. The microcontroller ran at 1 MHz clock speed and had 4Kb of address space.
References
- http://en.wikichip.org/wiki/nec/%CE%BCcom-4
- http://www.antiquetech.com/?page_id=786
- https://books.google.com/books?id=WQs0RMzTnnwC&pg=PA10&lpg=PA10
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