DESCRIPTION The 73M2921 is a CMOS integrated circuit which provides all the modem “Data Pump” functions required to implement a V.
22bis data modem.
It consists of a DSP (Digital Signal Processor) core with RAM and ROM data memory, ROM instruction memory, and register mapped input/output functions including timers, interrupts, Σ∆ ADC and DAC ports and Serial Data I/O.
Once the 73M2921 has been initialized, all call progress and modem handshaking is automatic.
The default conditions may be changed as required for country specific or custom applications.
The 73M2921 provides DTMF tone generation and detection, precise call progress detect and ADSI functions such as CAS tone detection.
Other fea...

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