24AA512T - 512K I
2
C Serial EEPROM
The Microchip Technology Inc. 24AA512 is a 512Kb (64K x 8) Serial Electrically Erasable PROM (EEPROM),
capable of operation across a broad voltage range (1.7V to 5.5V). It has been developed for advanced, low-power
applications such as personal communications and data acquisition. This device also has a page write capability of
up to 128 bytes of data. This device is capable of both random and sequential reads up to the 512K boundary.
Functional address lines allow up to eight devices on the same bus, for up to 4 Mbit address space. This device is
available in the standard 8-pin plastic DIP, SOIJ and DFN packages.
AD2428 - Automotive Audio Bus A
2
B Transceiver
The Automotive Audio Bus (A
2
B
®
) provides a multichannel, I2S/TDM link over distances of up to 15 m between
nodes. It embeds bidirectional synchronous pulse-code modulation (PCM) data (for example, digital audio), clock,
and synchronization signals onto a single differential wire pair. A
2
B 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.
A
2
B is a single-master, multiple-slave system where the transceiver chip at the host controller is the master. The mas-
ter generates clock, synchronization, and framing for all slave nodes. The master A
2
B chip is programmable over a
control bus (I
2
C) for configuration and read back. An extension of this control bus is embedded in the A
2
B data
stream, which grants direct access of registers and status information on slave transceivers as well as I
2
C to I
2
C com-
munication over distance.
The transceiver can connect 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-toanalog converters (DACs), and codecs through a multichannel I
2
S/TDM interface. It also provides a pulse
density modulation (PDM) interface for direct connection of up to four PDM digital microphones.
Finally, the transceiver also supports an A
2
B bus powering feature, where the master node supplies voltage and cur-
rent to the slave nodes over the same daisy-chained, twisted pair wire cable as used for the communication link.
ADAU1452 - SigmaDSP Digital Audio Processor
The ADAU1452 is a automotive qualified audio processors that far exceed the digital signal processing capabilities
of earlier SigmaDSP
®
devices. The restructured hardware architecture is optimized for efficient audio processing.
The audio processing algorithms are realized in sample-by-sample and block-by-block paradigms that can both be
executed simultaneously in a signal processing flow created using the graphical programming tool, SigmaStudio
®
.
The restructured digital signal processor (DSP) core architecture enables some types of audio processing algorithms
to be executed using significantly fewer instructions than were required on previous SigmaDSP generations, leading
to vastly improved code efficiency.
24AA512T - 512K I
2
C Serial EEPROM
2–4
EVAL-AD2428WD1BZ A
2
B Evaluation Board Manual
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