Electret Microphone Select Switch (Sw6); Codec Setup Switch (Sw7) - Analog Devices ADSP-21262 EZ-KIT Lite Manual

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Electret Microphone Select Switch (SW6)

To connect an electret microphone to the audio input, place all positions
of the switch "
SW6 ON
When all of the switches are in the "
added to the signal, and gain of the input amplifiers is changed from 1x to
10x.

Codec Setup Switch (SW7)

The codec setup switch (
the signals going to the AD1835A codec and to setup the communication
protocol of the codec.
Positions 1 and 2 determine the clock routing for the audio oscillator to
the codec and to the DSP.
1 and 2 are connected on the board. In the default position, route the
pin to
DAI_P17 DAI_P6
ADSP-21262 DSP
DAI_P6
DAI_P17
Figure 3-5. Audio Clock Routing
Position 3 of the
SW7
or is a slave. If the AD1835A is a master, the device's serial interface gen-
erates the frame sync and clock signals necessary to transfer data. When
ADSP-21262 EZ-KIT Lite Evaluation System Manual
EZ-KIT Lite Hardware Reference
". The default position of this switch is all "
" position, a DC offset of 2.5V is
ON
) can be used to change the routing of some of
SW7
Figure 3-5 illustrates how the switch positions
(in software) to clock the AD1835A.
AD1835 Codec
MCLK
12.288MHz
OSC
SW7.1
SW7.2
switch determines if the AD1835A device is a master
".
OFF
3-9