Datasheet

Switch Settings
2-10 ADSP-21262 EZ-KIT Lite Evaluation System Manual
Codec Setup Switch (SW7)
The codec setup switch (SW7) can be used to change the routing of some of
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 processor. Figure 2-5 illustrates how the switch
positions 1 and 2 are connected on the board. In the default position,
route the DAI_P17 pin to DAI_P6 (in software) to clock the AD1835A.
Position 3 of the SW7 switch determines if the AD1835A device is a master
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
the device is a slave, the processor must generate the frame sync and clock
signals. By default, position 3 is
ON, and the AD1835A generates the con-
trol signals.
Position 4 of
SW7 disconnects the AD1835A codec’s ADC_DATA pin from
the DAI interface. This is useful when the DAI interface is to connect to
another device.
Figure 2-5. Audio Clock Routing