Cirrus Logic CDB42L56 - Manual (Page 2)

2 DS851DB1
CDB42L56
TABLE OF CONTENTS
1. SYSTEM OVERVIEW ............................................................................................................................. 4
1.1 Control Port and Board Configuration .............................................................................................. 4
1.2 Power ............................................................................................................................................... 4
1.3 Digital Input ....................................................................................................................................... 4
1.3.1 CS8416 S/PDIF Digital Audio Receiver .................................................................................. 4
1.3.1.1 CS8421 Sample Rate Converter (Tx SRC to CS42L56) ............................................. 5
1.4 Digital Output .................................................................................................................................... 5
1.4.1 CS8406 S/PDIF Digital Audio Transmitter .............................................................................. 5
1.4.2 CS8421 Sample Rate Converter (Rx SRC from CS42L56) .................................................... 5
1.5 FPGA ................................................................................................................................................ 5
1.6 Oscillator ........................................................................................................................................... 6
1.7 PLL ................................................................................................................................................... 6
1.8 I/O Stake Headers ............................................................................................................................ 6
1.9 CS42L56 Audio Codec ..................................................................................................................... 6
1.10 Analog Inputs .................................................................................................................................. 6
1.11 Analog Outputs ............................................................................................................................... 7
2. QUICK-START GUIDE ........................................................................................................................... 8
3. CONFIGURATION OPTIONS ................................................................................................................. 9
3.1 S/PDIF In to Analog Out and Analog In to S/PDIF Out .................................................................... 9
3.2 PSIA In to Analog Out and Analog In to PSIA Out ......................................................................... 10
4. SOFTWARE MODE CONTROL ........................................................................................................... 11
4.1 Board Configuration Tab ................................................................................................................ 12
4.2 Codec Configuration Tab ................................................................................................................ 13
4.3 Codec Analog Input Volume Tab .................................................................................................... 14
4.4 Codec DSP Engine Tab ................................................................................................................. 15
4.5 Codec Analog Output Volume Tab ................................................................................................. 16
4.6 Register Maps Tab ......................................................................................................................... 17
5. JUMPER SETTINGS AND SYSTEM CONNECTIONS ........................................................................ 18
6. PERFORMANCE PLOTS ..................................................................................................................... 21
7. CDB42L56 BLOCK DIAGRAM ............................................................................................................ 27
8. CDB42L56 SCHEMATICS ................................................................................................................... 28
9. CDB42L56 LAYOUT ............................................................................................................................ 33
10. REVISION HISTORY .......................................................................................................................... 38
LIST OF FIGURES
Figure 1. Quick-Start Board Layout ............................................................................................................. 8
Figure 2. S/PDIF In to Analog Out and Analog In to S/PDIF Out ................................................................ 9
Figure 3. PSIA In to Analog Out and Analog In to PSIA Out ..................................................................... 10
Figure 4. Board Configuration Tab ............................................................................................................ 12
Figure 5. Codec Configuration Tab ........................................................................................................... 13
Figure 6. Codec Analog Input Volume Tab ............................................................................................... 14
Figure 7. Codec DSP Engine Tab ............................................................................................................. 15
Figure 8. Codec Analog Output Volume Tab ............................................................................................ 16
Figure 9. Register Maps Tab - CS42L56 .................................................................................................. 17
Figure 10. THD+N vs. Freq. - Analog In to Digital Out .............................................................................. 21
Figure 11. THD+N vs. Amplitude - Analog In to Digital Out ...................................................................... 21
Figure 12. FFT - Analog In to Digital Out @ -1 dBFS ............................................................................... 21
Figure 13. FFT - Analog In to Digital Out @ -60 dBFS ............................................................................. 21
Figure 14. FFT - Analog In to Digital Out - No Input ................................................................................. 22
Figure 15. FFT Crosstalk - Analog In to Digital Out
@ -1 dBFS ................................................................................................................................................ 22
Figure 16. Freq. Response - Analog In to Digital Out ............................................................................... 22