73M2901CLIGV

® TDK SEMICONDUCTOR CORP. 73M2901CL V.22bis Single Chip Modem May 2002 DESCRIPTION The 73M2901CL is a single-chip modem that combines all the controller (DTE) and data pump functions necessary to implement an intelligent V.22bis data modem. It is adequately suited for embedded applications where a data return channel is needed through the telephone network such as Set top Box, Point of Sale Terminal, Automatic Teller machine, Hand Held Communication Device and Smart Card Reader. This device is based on TDK Semiconductor’s implementation of the industry standard 8032 microcontroller core with a proprietary Multiply/ ACcumulate (MAC) coprocessor; Sigma-Delta A/D and D/A converters (CODEC); and an analog DAA drivers. The ROM and RAM necessary to operate the modem are contained on the device. Additionally, the 73M2901CL provides an on-chip oscillator and hybrid. FEATURES • • • • True one chip solution for embedded systems Low power As low as 9.5mA operating with standby and power down mode available Power supply operation from 3.6V to 2.7V Data speed: V.22bis – 2400bps V.22/Bell212 – 1200bps V.21/Bell103 – 300bps V.23 – 1200/75bps (with PAVI turnaround) Bell202 – 1200bps Bell202/V23 4-wire operations International Call Progress support FCC68, CTR21, JATE, etc. Worldwide Caller ID capability Type I and II support EIA 716 compliant DTMF generation and detection On chip hybrid driver Blacklisting capability Line-In-Use and Parallel Pick-Up (911) detection capability Manufacturing Self Test capability Packaging: 32 pin PLCC / 32 pin TQFP / 44 pin LQFP • • • • • • • • BLOCK DIAGRAM 73M2901CL V.22bis Single Chip Modem HARDWARE DESCRIPTION The 73M2901CL is designed to operate from a +3.6 to +2.7 volt supply with low power consumption (~30mW @ 3.0 volts). The modem supports automatic standby idle mode. The modem will also accept a request to power down from the DTE via hardware control. No additional major components are required to complete the modem core logic. The modem provides direct firmware LED support via port pins. HARDWARE FEATURES • • • • • • Fully self-contained. “AT” Command interpreter and data pump User pins available Synchronous serial data I/O available Asynchronous serial port On-chip hybrid and line driver. Autobaud capability from 300bps to 9600bps INTERRUPT PINS The external interrupt sources, '75 and 5,1*, come from dedicated input pins of the same name. DTR informs the 73M2901CL that the host has requested the 73M2901CL perform a specific function. The function of '75 can be changed by “AT” commands (described in full in the TDK 73M2901CL User’s Guide). RING is used to inform the 73M2901CL that the external DAA circuitry has detected a ring signal. In addition, sending any character on the TXD line also generates an internal interrupt. CRYSTAL OSCILLATOR LOW POWER MODE The TDK 73M2901CL supports a low power standby mode. If the low power standby option is enabled the 73M2901CL will go into a power saving mode when idle. The oscillator will be running, clocks will be supplied to the UART, timers and interrupt blocks; The TDK 73M2901CL single chip modem can use an external 11.0592 MHz reference clock or can generate a clock using only a crystal and two capacitors. If an external clock is used, it should be applied to OSCIN. but no clocks will be supplied to the CPU. Instruction processing and activity on the internal busses is halted. Normal operation is resumed when an interruption such as assertion of '75 or 5,1*, a character is sent to the 73M2901CL TXD input, or a reset occurs. ANALOG LINE / HYBRID INTERFACE The 73M2901CL provides a differential analog output (TXAP and TXAN) and a single-ended analog input (RXA) with internal A/D and D/A converters. A driver is provided for an internal hybrid function. The internal hybrid driver is capable of driving an external load matching impedance and a linecoupling transformer. The internal hybrid/line driver senses the load and adapts itself to its requirements. The 73M2901CL provides firmware control for a hook relay driver (5(/$