Analog Devices EZ-KIT Lite ADSP-BF533, Manual

Page: 51 / 108

ADSP-BF533 EZ-KIT Lite Evaluation System Manual 2-11
Using EZ-KIT Lite
Using Audio
The AD1836 audio codec provides three channels of stereo audio output
and two channels of multichannel 96 kHz input. The
SPORT0
interface of
the processor is linked with the stereo audio data input and output pins of
the AD1836 codec. The processor is capable of transferring data to the
audio codec in time-division multiplexed (TDM) or I
2
S mode.
The I
2
S mode allows the codec to operate with a 96 kHz sample rate but
only allows you to use two channels of output. TDM mode can operate at
a maximum of 48 kHz sample rate but allows for simultaneous use of all
input and output channels. When using I
2
S mode, the
TSCLK0
and
RSCLK0
pins, as well as the
TFS0
and
RFS0
pins of the processor, must be tied
together external to the processor. This is accomplished with the
SW9
DIP
switch (see “Push Button Enable Switch (SW9)” on page 3-12 for more
information).
The AD1836 audio codec’s internal configuration registers are configured
using the processor’s SPI port. The processor’s
PF4
programmable flag pin
is used as the select for this device. For information on how to configure
the multichannel codec, go to
www.analog.com/UploadedFiles/Datasheets/344740003AD1836_prc.pdf
.
The reset for the AD1836 codec comes from the general-purpose IO pin
PA0
of Flash A. For information on how to use the pin, see “Flash Gen-
eral-Purpose IO” on page 2-7 .
Example programs are included in the EZ-KIT installation directory to
demonstrate the AD1836 codec operation.