of the 80C51 family, as listed below. P3.0 / RxD receiver data input (asynchronous) or data input output(synchronous) of serial interface 0 transmitter data output (async.

GMS90C31

GMS90C32

GMS90C320

GMS90C51

GMS90C52

GMS90C54

GMS90C56

GMS90C58

GMS90L31

GMS90L32

GMS90L320

GMS90L51

GMS90L52

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