A2B BUS FEATURES
Line topology
Single main node, up to 16 subordinate nodes
Up to 15 m between nodes and up to 80 m overall cable
length
Communication over distance
Synchronous data
Multichannel I2S/TDM to I2S/TDM
Clock synchronous, phase-aligned in all nodes
Low latency subordinate-to-subordinate
communication
Control and status information I2C to I2C
GPIO over distance
Bus power or local power subordinate nodes
Configurable with SigmaStudio+ graphical software tool
AEC-Q100 qualified for automotive applications
BASELINE A2B TRANSCEIVER FEATURES
Configurable as A2B main or last subordinate nodes
Programmable via I2C interface
8-bit to 32-bit multichannel I2S/TDM interface
I2S/TDM/PDM programmable data rate
I2C mailbox
PDM inputs for 4 high dynamic range microphones on main
or subordinate nodes
Support for receiving I2S/TDM data on nodes with up to
4 PDM microphones
Unique ID register for each transceiver
Support for crossover or straight-through cabling
Programmable settings to optimize EMC performance
AD2430/AD2438 TRANSCEIVER ENHANCEMENTS
Cable diagnostics with integrated line power switches
Supports 3.3 V input at VIN in low voltage input (LVI) mode
for local powered subordinate node
Dedicated hardware reset pin
I2S/TDM crossbar switch
Flexible mapping of Tx/Rx TDM channel data to A2B slots
Support for I2C fast mode plus (1 MHz)
Support for in-cabin LED control using 4 PWM outputs
8 GPIO pins with configurable pin mapping
AUTOMOTIVE APPLICATIONS
Hands free/speech recognition
Microphone arrays
In-car telematics and emergency call systems
Overhead consoles
In-car communications