Cirrus Logic CDB48500-USB - Manual (Page 4)

iv CDB48500 USB Evaluation Kit Guide
CDB48500
Chapter 4. Configuring the CDB48500 ................................................................ 4-1
4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.2 Basic Application Download and System Configuration for PCM Pass-through. . . . . . . . 4-1
4.2.1 System Block ................................................................................................................. 4-2
4.2.2 Changing the Audio Input Source .................................................................................. 4-3
4.2.2.1 Audio In via S/PDIF ....................................................................................... 4-3
4.2.2.2 Audio In via 8-channel ADC .......................................................................... 4-3
4.2.2.3 Audio In via USB ........................................................................................... 4-4
4.2.2.4 DAI Input of CS485xx .................................................................................... 4-4
4.2.3 Changing Audio Output Configuration............................................................................ 4-5
4.2.3.1 DAO Output of CS485xx ............................................................................... 4-5
4.2.3.2 CS42448 DAC Properties.............................................................................. 4-6
4.2.4 Changing Serial Control Protocol (I2C or SPI) ............................................................... 4-7
4.2.5 Headphone Output ......................................................................................................... 4-8
4.2.6 S/PDIF Transmitter......................................................................................................... 4-9
Appendix A. Schematics .....................................................................................A-1
A.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
A.1.1 Schematic Pages ...........................................................................................................A-1
A.1.1.1 Detailed Schematic Descriptions ..................................................................A-1
A.1.1.1.1 CS48500 System Block Diagram (See Figure A-1) ........................A-1
A.1.1.1.2 DSP Input Data Multiplexing (See Figure A-2)................................A-1
A.1.1.1.3 Coyote DSP Core (See Figure A-3) ................................................A-1
A.1.1.1.4 Serial Flash Memory (See Figure A-4) ...........................................A-2
A.1.1.1.5 S/PDIF Receiver (See Figure A-5)..................................................A-2
A.1.1.1.6 Codec #1(CS42448) (See Figure A-6)............................................A-3
A.1.1.1.7 Codec #2 (CS42448) (See Figure A-7)...........................................A-3
A.1.1.1.8 Codec 1 and Codec 2 Input Filters (See Figure A-8) ......................A-4
A.1.1.1.9 Output Filters & Headphone Output (See Figure A-9) ....................A-4
A.1.1.1.10 Mic and Pre-Amp (See Figure A-10).............................................A-4
A.1.1.1.11 Control Connector and Power (See Figure A-11) .........................A-4
Appendix B. Troubleshooting Guide..................................................................B-1
B.1 Intoduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
B.1.1 Solutions to Possible Problems .....................................................................................B-1
B.1.1.1 Power LEDs are Not illuminated ...................................................................B-1
B.1.1.2 CDB48500 is Not Recognized by the PC......................................................B-1
B.1.1.3 Unable to Run a Stereo PCM Application .....................................................B-1
Revision History....................................................................................................B-2