Leds And Push Buttons - Analog Devices Lite ADSP-21375 EZ-KIT System Manual

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The AD1835A codec can be configured as a master or as a slave, depend-
ing 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.
The internal configuration registers of the codec are configured using the
SPI port of the processor. The DPI pin 4 (
select for the device. For information on how to configure the
multichannel codec, refer to the product data sheet at
.
AD1835A
The RCA connector (
electret microphone on this connector, configure switch
the instructions in "Electret Microphone Select Switch (SW4)" on
page 2-12. The four output channels are connected to the RCA
connector ( ). Channel 4 of the codec connects to the headphone
J5
jack ( ). For more information, see
J9
Example programs are included in the EZ-KIT Lite installation directory
to demonstrate how to configure and use the on-board analog audio
interface.

LEDs and Push Buttons

The EZ-KIT Lite has eight general-purpose user LEDs and four gen-
eral-purpose push buttons.
Two general-purpose push buttons are attached to the
processor, while the other two are attached to the DAI pins. All of the
push buttons are connected to the processor through a DIP switch (
The DIP switch can disconnect the processor pins connected to the push
buttons. See "Push Button Enable Switch (SW7)" on page 2-13
ADSP-21375 EZ-KIT Lite Evaluation System Manual
Using the ADSP-21375 EZ-KIT Lite
"Codec Setup Switch (SW3)" on
DPI4
) is used to input analog audio. When using an
J10
"Connectors" on page
register) is used as the
according to
SW4
2-21.
pins of the
FLAG
).
SW7
for
1-15