Analog Devices EVAL-ADAU1772Z, User Manual

Page: 13 / 29

UG-477 Evaluation Board User Guide
Rev. A | Page 12 of 28
PDM Modulator Output
The ADAU1772 has a 2-channel PDM modulator. The PDM
output and clock source are both located on the MP pins. To use
this functionality, set
ADC_SDATA0/PDMOUT/MP1 to PDM
Modulator Output and CLKOUT/ADC_SDATA1/MP6 to
Clock Output . This can be done in the Pin/Pad Control tab
(see Figure 38).
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Figure 38 PDM Modulator Output and Clock Output
The CLOCK OUT is located on the J4 header, Pin 12. The PDM
OUTPUT is located on the J4 header, Pin 10 (see Figure 39).
PDM OUTPUT
CLOCK OUT
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Figure 39. PDM Output and Clock Output Pins
MP PINS
The MP pin jumpers, Header J9, provide access to the MP pins
(MP0, MP1, MP2, MP3, and MP6) of the
ADAU1772 , as well as
facilitate the use of the push-buttons on the EVAL-ADAU1772Z
board. See Figure 53 for the pinout of the header. These jumpers
are used to enable the use of the volume control, mute, and
other capabilities of the
ADAU1772 .
To use the full functionality of the MP pins on the ADAU1772 ,
change the selections in the drop-down menus under the Pin/Pad
Control tab in the Hardware Configuration / ADAU1772
Register Control section of SigmaStudio (see Figure 40).
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Figure 40. MP Pins Drop-Down Menus
The MP pins, MP4 and MP5, are connected to the digital micro-
phone headers, J6 and J7.