Analog Devices EVAL-ADAU1777Z, Руководство пользователя

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UG-1055 EVAL-ADAU1777Z User Guide
Rev. 0 | Page 14 of 25
TDM/I
2
S Stream
To use the serial audio outputs, connect the LRCLK, BCLK, and
SDATA lines to the appropriate MP pins on the evaluation
board. The connections are located on the J4 header. The silk
screen above the header helps to identify where to connect the
clocks and data (see Figure 42).
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054-
042
Figure 42. Serial Audio Port
When the MP pins are connected, use SigmaStudio to set the
registers for the desired operation. In the Output/Serial Port
tab, the Serial Port Control section contains settings that can
be changed to create the specific data stream desired. These
settings include
Serial Port FS (sample rate), Serial Port Mode ,
Serial Port Format , LRCLK/BCLK Mode (slave or master),
BCLK Data-Change Edge
,
Bit Width in TDM mode
,
BCLK
Cycles per Channel , Data IO on LSB/MSB , Unused TDM
Outputs , LRCLK Mode (as pulse or 50% duty cycle), and
LRCLK Polarity (see Figure 43).
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043
Figure 43. Serial Port Control
If using TDM mode, ensure that the appropriate TDM output
channels have been enabled in the
TDM Output Channel
section (see Figure 44).
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505
4-
0
44
Figure 44. TDM Output Channel
Use the
Signal Routing
tab to route the core outputs, ADCs, or
serial inputs to the either of the two available serial output lines.
Ensure that
Output ASRC is set to Enabled (see Figure 45).
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54-
04
5
Figure 45. Signal Routing
COMMUNICATIONS HEADER (J1)
J1 connects to the EVAL-ADUSB2EBZ USBi. More information
about the USBi can be found in the AN-1006 application note.
The IC defaults to I
2
C mode; however, it can be put into SPI
control mode by pulling the CLATCH pin low three times.
SELF-BOOT
To use the ADAU1777 self-boot function, go to the Hardware
Configuration tab and add an E2Prom IC to the USBi interface
from the Tree Toolbox (see Figure 46).
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046
Figure 46. E2Prom