Cirrus Logic CK4970x4 - Manual (Page 5)

DS898CK7 Copyright 2012 Cirrus Logic, Inc
CK49x User’s Manual
Chapter 6. CK49x Schematics.............................................................................. 6-1
6.1 Obtaining Schematic Updates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
6.1.1 CK49x Daughter Card Schematics..................................................................................6-1
6.1.1.1 DC4953xx Daughter Card Modification .........................................................6-1
Chapter 7. Troubleshooting.................................................................................. 7-1
7.1 Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
7.1.1 Power LEDs.....................................................................................................................7-1
7.1.2 Board not Recognized by PC ..........................................................................................7-1
7.1.3 Audio is not Heard...........................................................................................................7-1
7.1.4 Only Stereo Audio is Heard .............................................................................................7-2
Appendix A. Modification for the Serial Flash Chip Select Signal on DC4953x3A-1
Appendix B. DAI I2S Play Back Header.............................................................. B-1
B.1 DAI I2S Play Back Header. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Appendix C. CDB49x Rev. A Rework for I2C Buffer on SCP_CLK .................. C-1
C.1 Modifications to Improve the Signal Integrity of I
2
C Communications . . . . . . . . . . . . . . . C-1
Appendix D. CDB49x Rev. A Rework for I2C Buffer on DBCK Signal ............. D-1
D.1 Modifications to Improve the Signal Integrity of Debugger Communications . . . . . . . . . D-1
Revision History ................................................................................................... D-2