73M2901CL V.22bis Single Chip Modem DATA SHEET JULY 2005 DESCRIPTION FEATURES The 73M2901CL is a single-chip modem that True one chip solution for embedded systems combines all the controller (DTE) and data pump Low power functions necessary to implement an intelligent As low as 9.5mA operating, with standby and power down mode available V.22bis data modem. Power supply operation from 3.6V to 2.7V It is suited for embedded applications where a data Data speed: return channel is needed through the telephone V.22bis 2400bps network such as Set top Box, Point of Sale Terminal, V.22/Bell212 1200bps Automatic Teller machine, Hand Held V.21/Bell103 300bps Communication Device and Smart Card Reader. V.23 1200/75bps (with PAVI turnaround) Bell202 1200bps This device is based on TERIDIAN Semiconductors Bell202/V23 4-wire operations implementation of the industry standard 8032 International Call Progress support microcontroller core with a proprietary Multiply/ FCC68, CTR21, JATE, etc. ACcumulate (MAC) coprocessor Sigma-Delta A/D Worldwide Caller ID capability and D/A converters (CODEC) and an analog DAA Type I and II support drivers. The ROM and RAM necessary to operate EIA 716 compliant the modem are contained on the device. DTMF generation and detection Additionally, the 73M2901CL provides an on-chip On chip hybrid driver oscillator and hybrid. 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 Page: 1 of 18 2005 TERIDIAN Semiconductor Corporation Rev 2.0 73M2901CL V.22bis Single Chip Modem DATA SHEET but no clocks will be supplied to the CPU. Instruction HARDWARE DESCRIPTION processing and activity on the internal busses is The 73M2901CL is designed to operate from a +3.6 halted. Normal operation is resumed when an to +2.7 volt supply with low power consumption interruption such as assertion of DTR or RING, a (~30mW 3.0 volts). The modem supports character is sent to the 73M2901CL TXD input, or a automatic standby idle mode. The modem will also reset occurs. accept a request to power down from the DTE via hardware control. No additional major components ANALOG LINE / HYBRID INTERFACE are required to complete the modem core logic. The modem provides direct firmware LED support via The 73M2901CL provides a differential analog port pins. 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. HARDWARE FEATURES The internal hybrid driver is capable of driving an Fully self-contained. AT Command interpreter external load matching impedance and a line- and data pump coupling transformer. The internal hybrid/line driver User pins available senses the load and adapts itself to its requirements. Synchronous serial data I/O available The 73M2901CL provides firmware control for a hook relay driver (RELAY) as well as interrupt Asynchronous serial port support for a ring detect opto-coupler (RING). On-chip hybrid and line driver. Autobaud capability from 300bps to 9600bps INTERRUPT PINS The external interrupt sources, DTR and RING, POWER SUPPLY come from dedicated input pins of the same name. Power is supplied to the 73M2901CL via the VPD DTR informs the 73M2901CL that the host has and VPA pins. The 73M2901CL is designed for a requested the 73M2901CL perform a specific single +3.6 to +2.7 volt supply and for low power function. The function of DTR can be changed by consumption (~30mW 3.0 volts). Ground is AT commands (described in full in the TERIDIAN supplied to the 73M2901CL via VND and VNA pins. 73M2901CL Users Guide). The 73M2901CL has been designed with separated RING is used to inform the 73M2901CL that the analog and digital supplies to insure the best external DAA circuitry has detected a ring signal. performance of the part by using different filtered In addition, sending any character on the TXD line power supplies. It is recommended that separate also generates an internal interrupt. locally bypassed traces be used to apply power to the analog supply VPA and the digital supply VPD. CRYSTAL OSCILLATOR The TERIDIAN 73M2901CL single chip modem can LOW POWER MODE use an external 11.0592 MHz reference clock or can The TERIDIAN 73M2901CL supports a low power generate a clock using only a crystal and two standby mode. If the low power standby option is capacitors. If an external clock is used, it should be enabled the 73M2901CL will go into a power saving applied to OSCIN. mode when idle. The oscillator will be running, clocks will be supplied to the UART, timers and interrupt blocks, Page: 2 of 18 2005 TERIDIAN Semiconductor Corporation Rev 2.0