Figure 4-11. ck49x comm mode / memory usage -8, 2 changing serial control protocol (i, Or spi – Cirrus Logic CK4970x4 User Manual
Page 42
Programming the DSP on the CK49x Evaluation Board
CK49x User’s Manual
DS898CK7
Copyright 2012 Cirrus Logic, Inc
4-8
This dialog allows the user to set the following parameters for the CK49x Audio Output:
• LRCLK polarity - Select the phase of LRCLK when the left-sample will be shifted out.
• SCLK polarity - Select which edge of SCLK for which the output data will be valid.
• DAO1/DAO2 - Select independent or unified clock domains for the DAO1 and DAO2 audio output
ports.
• MCLK/SCLK Ratios - Select the ratio of LRCLK to MCLK, and LRCLK to SCLK.
4.4.2 Changing Serial Control Protocol (I
2
C
or SPI
) / Memory Usage
The CK49x 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
Properties, which brings up
the Project Properties dialog. To configure Memory usage click on the Advanced button, as illustrated in
. Max memory allocation and external memory can be enabled from this panel.
Figure 4-11. CK49x Comm Mode / Memory Usage