Analog Audio - Analog Devices ADSP-21369 EZ-KIT Lite Manual

Analog Audio

For more information on ELVIS and example demonstration programs,
visit National Instruments Web site at
Analog Audio
The AD1835A device is a high-performance, single-chip codec featuring
four stereo digital-to-analog converters (DACs) for audio output and one
stereo analog-to-digital converters (ADCs) for audio input. The codec can
input and output data with a sample rate of up to 96 kHz on all channels.
A 192 kHz sample rate can be used with one of the DAC channels.
The processor is interfaced with the AD1835A codec via the DAI port.
The DAI pins can be configured to transfer serial data from the codec in
either time-division multiplexed (TDM) or 2-wire interface mode (TWI).
For more information on the AD1835A connection to the DAI, see
Interface" on page
The master input clock (
by the on-board 12.288 MHz oscillator or supplied by one of the DAI
pins of the processor. Using a DAI pin to generate the
the on-board oscillator, allows synchronization of multiple devices in the
system. This is done on the EZ-KIT Lite when data is coming from the
Sony/Philips Digital Interface (S/PDIF) receiver and being output
through the codec. The S/PDIF
the processor's signal routing unit (SRU). It is possible to disable the
on-board audio oscillator from driving the audio codec and the processor's
input pin. For instructions on how to configure the clock, refer to
Setup Switch (SW3)" on page
The AD1835A codec can be configured as a master or a slave, depending
on the DIP switch settings. In master mode, the codec drives the serial
port clock and frame sync signals to the processor. In slave mode, the pro-
cessor must generate and drive all of the serial port clock and frame sync
signals. For more information, refer to
page 2-11.
1-10
www.BDTIC.com/ADI
2-4.
) for the AD1835A codec can be generated
MCLK
MCLK
2-11.
ADSP-21369 EZ-KIT Lite Evaluation System Manual
.
www.ni.com
MCLK
is routed to the AD1835A's
"Codec Setup Switch (SW3)" on
"DAI
, as opposed to
in
MCLK
"Codec