Cirrus Logic CDB48500-USB, Manual, Page: 31 / 52

4-7
©
Copyright 2008 Cirrus Logic , Inc. DS784DB1
Basic Application Download and System Configuration for PCM Pass-through
CDB48500--USB Evaluation Kit Guide
.
Figure 4-7. Codec DAC Properties
This dialog allows the user to set the following parameters for the CS42448 DACs:
• Audio Data Format - Slave to DAO setting (Cannot be changed).
• Input Sampling Frequency Range - Select the Fs range where 1FS = 32 kHz, 44.1 kHz, or 48 kHz,
2Fs = 64 kHz, 88.2 kHz, 96 kHz, etc.
• Master/Slave settings for the SCLK & LRCLK - Automatically configure for complement of the DAO
Setting (Cannot be changed).
• SCLK polarity - Slaves to the DAO Setting (Cannot be changed).
4.2.4 Changing Serial Control Protocol (I
2
C or SPI)
The CDB48500 is designed to communicate using either I
2
C or SPI protocols. In order to change the
communication mode in DSP Composer go to the menu bar and select File
Ö
Properties, which brings up
the Project Properties dialog. Click the Advanced button to get the Advanced Properties dialog as shown
in
Figure 4-8 . The Board Comm Mode pull-down menu allows the user to choose the serial protocol of the
user’s choice.