In-car telematics and emergency call systemsĪ 2B is a single main node, multiple subordinate node system where the transceiver at the host controller is the main node.GPIO status and control is directly conveyed between nodes.Īdditionally, the transceiver also supports an A 2B bus powering feature, where the main node supplies voltage and current to the subordinate nodes over the same daisy-chained, twisted pair wire cable as used for the communication link. The transceiver’s pulse width modulated (PWM) outputs can control LED drivers or voltage regulators. It also provides a pulse density modulation (PDM) interface for direct connection of up to four PDM digital microphones. The transceiver can connect directly to general-purpose digital signal processors (DSPs) or microprocessors, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), microphones, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and codecs through a multichannel I 2S/TDM interface. An extension of this control bus is embedded in the A 2B data stream, which grants direct access to registers and status information on subordinate node transceivers, as well as I 2C to I 2C communication from the host to a peripheral in a subordinate node. The main A 2B transceiver chip is programmable over a control bus (I 2C) for configuration and read back. The main node generates clock, synchronization, and framing for all subordinate nodes. A 2B supports a direct point to point connection and allows multiple, daisy-chained nodes at different locations to contribute and/or consume time division multiplexed channel content.Ī 2B is a single-main, multiple-subordinate node system where the transceiver at the host controller is the main transceiver. It embeds bidirectional synchronous pulse-code modulation (PCM) data (for example, digital audio), clock, and synchronization signals onto a single unshielded twisted pair (UTP) differential cable. The Automotive Audio Bus (A 2B ®) provides a multichannel, I 2S/TDM link over distances of up to 15 m between nodes.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |