Modulator-demodulator apparatus and system

摘要

In a MODEM having modulation and demodulation circuits and a circuit for controlling the modulation and demodulation, a modulator-demodulator apparatus includes a register for accepting a macro-instruction from an external source; a circuit for interpreting and executing the macro-instruction; and a circuit for outputting a response to the macro-instruction, whereby the MODEM is controlled in response to the macro-instruction accepted from the outside source. The modulator-demodulator apparatus is suitably integrated over a single semiconductor substrate.