Cirrus Logic CDB48500-USB, Руководство пользователя, Страница: 30 / 52

Basic Application Download and System Configuration for PCM Pass-through
CDB48500--USB Evaluation Kit Guide
DS784DB1
©
Copyright 2008 Cirrus Logic , Inc. 4-6
.
Figure 4-6. CDB48500 Digital Audio Output Properties
This dialog allows the user to set the following parameters for the CS485XX Audio Output:
• Mode - Master/slave settings for the SCLK & LRCLK pins.
• Audio Data Format - I
2
S, LJ, etc.
• SPDIF Enable - Checking this box configures DAO3 for S/PDIF output rather than I
2
S.
• 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.
4.2.3.2 CS42448 DAC Properties
The analog output properties are selected through the CODEC DAC Properties dialog box in DSP
Composer, as shown in
Figure 4-7 . Right-click on the “Audio Out” block, then select Device Properties.
Right-clicking the “Codec DAC” block and selecting Device Properties produces the Codec DAC
Properties dialog.