MSU2051 mcu equivalent, (msu2051 / msu2031) low working voltage 16 mhz rom less mcu.
and a powerful instruction set, necessary to make it a versatile and cost effective controller for those applications demand up to 32 I/O pins or need up to 64 K byte ext.
demand up to 32 I/O pins or need up to 64 K byte external memory either for program or for data or mixed. A serial input.
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