73M2901/5V Advanced Single Chip Modem

FIRMWARE DESCRIPTION2

An “AT” command interpreter provides command and configuration of the 73M2901/5V. This provides the user a uniform interface to control the modem in embedded applications.

The signal processing is performed by obtaining data from and providing data to the integrated A/D converter. A MAC hardware processor is provided for computation.

To provide maximum flexibility, the system host processor can access the internal RAM and Control Register space in the modem. This will allow the OEM user to modify parameters such as filter response, transmit levels through the AT command

set using proprietary commands. The host processor can also access the modem I/O port pins, providing extended I/O capability.

FIRMWARE REQUIREMENTS

FIRMWARE FEATURES

∙“AT” command set

∙Supports data standards through V.22bis

∙Provides DAA control firmware (e.g. ring detect, hook control, line in use detection support)

∙Multinational Call progress support (FCC68, CTR21, JATE…)

∙Caller ID capability

FSK demodulation (V23 or Bell202) Intra 1st/2nd ring CID data operations Post Line reversal CID data operations

∙Interfaces with standard V.24/EIA-232 (3-5 volt inverted level) serial interface using the built in serial port and firmware control of port pins

∙Provides tone generation and detection, four imprecise and four precise call progress detect filters

∙Host access to program RAM provided

∙User access to modem functions

The modem always powers up in the idle (on hook) mode. “AT” commands are issued via the serial interface from the host. All modem configuration commands are received in this manner. The data modem firmware is contained in an internal ROM. The firmware will automatically enter a power saving idle mode if the modem is on hook and there are no

incoming host commands. The modem automatically powers up upon receiving the next command. This power up sequence occurs without delay to the host. This function, while saving power, is transparent to the host processor and can be disabled by the host via an “AT” command. The host can also program the modem to power down via external pin (DTR) or via a firmware command.

2For a detailed description of the firmware consult the TDK 73M2901 User’s Manual.

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TDK 73M2901/5V manual Firmware DESCRIPTION2, Firmware Requirements Firmware Features
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73M2901/5V specifications

The TDK 73M2901/5V is a compact and versatile power management IC designed for a wide array of applications, particularly in portable electronic devices. This chip is part of TDK's extensive lineup of power management solutions, showcasing advanced technologies and features that cater to the evolving needs of modern electronics.

One of the standout characteristics of the TDK 73M2901/5V is its ability to support a broad input voltage range. This flexibility allows the device to operate efficiently with various power supply configurations, making it suitable for battery-operated devices, USB-powered systems, and more. Its robust design ensures that it can maintain stable performance even under fluctuating voltage conditions, a critical attribute for portable applications.

The 73M2901/5V integrates several key power management features, including voltage regulation, power distribution, and battery management functionalities. The integrated voltage regulator provides precise output voltage control, helping to preserve battery life by managing power consumption effectively. This feature is particularly essential for devices that rely on rechargeable batteries, as it enhances overall efficiency and prolongs usage times between charges.

In addition to voltage regulation, the TDK 73M2901/5V boasts advanced power distribution capabilities. The chip can intelligently manage power routing among multiple components within a device, ensuring optimal performance without unnecessary power loss. This is crucial for devices that incorporate various subsystems, needing coordinated power management to function seamlessly.

Furthermore, the 73M2901/5V includes built-in battery management capabilities that facilitate safe charging and discharging processes. This feature not only guards against overcharging and overheating but also extends the lifespan of lithium-ion and lithium-polymer batteries commonly found in consumer devices.

From a technological standpoint, the TDK 73M2901/5V utilizes cutting-edge semiconductor processes that enhance its efficiency and thermal performance. This results in reduced heat generation, allowing for compact designs without the risk of overheating. The chip is also designed for low quiescent current, which minimizes power draw during standby or idle states, further enhancing energy efficiency.

Overall, the TDK 73M2901/5V is a highly capable power management IC that combines robustness, efficiency, and advanced features. Its adaptability to various power configurations, integrated management capabilities, and modern semiconductor technologies make it an ideal choice for developers seeking reliable solutions for their portable electronic designs. As technology continues to advance, solutions like the TDK 73M2901/5V will play an increasingly vital role in powering the next generation of electronic devices.
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