1.

Design of a 4 bit microcontroller

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Some of the first microprocessors had a 4-bit WORD length and were DEVELOPED AROUND 1970. The TMS 1000, the world's first single-chip microprocessor, was a 4 -bit CPU; it had a Harvard architecture, with an on-chip instruction ROM, 8-bit- wide instructions and an on-chip data RAM with 4-bit words. The first COMMERCIAL



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