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The AD2433WCCPZY20-RL Automotive Audio Bus (A2B®) provides a multi-channel, I2S/ TDM link between two nodes up to 15 m apart. It imparts bidirectional synchronous pulse-coded modulation (PCM) data (for example, digital audio), clock, and synchronization signals onto a single unshielded twisted pair (UTP) differential cable. A2B supports direct point-to-point connectivity, allowing multiple Daisy chain connection nodes at different locations for the provision and/or use of time division multiplexing channel content.

A2B is a system with single master node and multiple slave nodes. The transceiver in the master controller is the master node. The master node generates clocks, synchronization, and framing for all slave nodes. The main A2B transceiver can be programmed via the control port (I2C/SPI) for configuration and read-back. Extensions of the control port protocol are embedded in the A2B data stream. This allows direct access to register and state information on the slave transceiver, as well as i2c-to-i2c, SPI to I2C, or SPI to SPI communication from the host to peripherals in the slave node. Spi-to-spi communication between slave nodes can be performed directly without involving the master node.

The transceiver connects directly to general-purpose digital signal processors (DSPS), field Programmable gate arrays (FPGas), application-specific integrated circuits (ASics), microphones, analog-to-digital converters (AdCs), digital-to-analog converters (DAC), and codecs via multi-channel I2S/ TDM interfaces. It also offers a pulse density modulation (PDM) interface for direct connection to up to four PDM digital microphones.

Application:

Distributed audio system

Personal audio area

In-car communication

Intelligent/remote frequency modulator module

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