Analog Devices EZ-KIT Lite ADSP-21364 - Manual (Page 31)

ADSP-21364 EZ-KIT Lite Evaluation System Manual 1-9
Using ADSP-21364 EZ-KIT Lite
opposed to the on-board oscillator, allows synchronization of multiple
devices in the system. This is done on the EZ-KIT Lite when data is com-
ing from the S/PDIF receiver and being output through the audio codec.
The S/PDIF
MCLK is routed to the AD1835A MCLK in the processor’s signal
routing unit (SRU). It is also necessary 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
“Codec Setup Switch
(SW7)” on page 2-10 .
The AD1835A codec can be configured as a master or as a slave, depend-
ing on the DIP switch settings. In master mode, the AD1835A drives the
serial port clock and frame sync signals to the processor. In slave mode,
the processor must generate and drive all of the serial port clock and frame
sync signals. For information on how to set the mode, refer to
“Codec
Setup Switch (SW7)” on page 2-10 .
The AD1835A audio codec’s internal configuration registers are config-
ured using the SPI port of the processor. The
FLAG3 register is used as the
select for the device. For information on how to configure the multichan-
nel codec, refer to the codec datasheet, which can be found at
http://www.analog.com/en/prod/0,2877,AD1835A,00.html .
The RCA connector ( J4 ) is used to input analog audio. When using an
electret microphone on this connector, configure the SW6 switch according
to the instructions in “Electret Microphone Select Switch (SW6)” on
page 2-9 . The four output channels connect to the RCA connector J5 .
Channel 4 of the codec connects to the headphone jack J6 . For more
information, see “Connectors” on page 2-16 .
Example programs are included in the EZ-KIT Lite installation directory
to demonstrate how to configure and use the board’s analog audio
interface.