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ADSP-21369 EZ-KIT Lite Evaluation System Manual 2-11
EZ-KIT Lite Hardware Reference
Position 4 of
SW3 disconnects the AD1835A’s ADC_DATA pin from the DAI
interface. This is useful when the DAI interface connects to another
device.
Electret Microphone Select Switch (SW4)
To connect an electret microphone to the audio input, place all positions
of the
SW4 switch ON. The default position of the switch is all OFF. When all
of the positions are in the
ON position, a DC offset of 2.5V is added to the
signal, and gain of the input amplifiers is changed from 1x to 10x.
UART Enable Switch (SW5)
The UART enable switch (SW5) disconnects UART signals from the DPI
pins of the processor. When the switch is in the
OFF position, the associ-
ated DPI signal (see Table 2-5) can be used on the expansion interface.
Figure 2-5. Audio Clock Routing
AD1835A Codec
MCLK DAI_P6
ADSP-21369 Processor
DAI_P17
SW3.1
12.288MHz
OSC
SW3.2