User Manual

6 DS680F2
CS42L52
3/1/13
6.25.1 Master Volume Control ........................................................................................................ 63
6.26 Headphone Volume Control: HPA (Address 22h) and HPB (Address 23h) ................................. 63
6.26.1 Headphone Volume Control ................................................................................................63
6.27 Speaker Volume Control: SPKA (Address 24h) and SPKB (Address 25h) .................................. 64
6.27.1 Speaker Volume Control ..................................................................................................... 64
6.28 ADC and PCM Channel Mixer (Address 26h) .............................................................................. 64
6.28.1 PCM Mix Channel Swap ..................................................................................................... 64
6.28.2 ADC Mix Channel Swap ...................................................................................................... 64
6.29 Limiter Control 1, Min/Max Thresholds (Address 27h) ................................................................. 65
6.29.1 Limiter Maximum Threshold ................................................................................................ 65
6.29.2 Limiter Cushion Threshold .................................................................................................. 65
6.29.3 Limiter Soft Ramp Disable ................................................................................................... 65
6.29.4 Limiter Zero Cross Disable .................................................................................................. 66
6.30 Limiter Control 2, Release Rate (Address 28h) ............................................................................ 66
6.30.1 Peak Detect and Limiter ...................................................................................................... 66
6.30.2 Peak Signal Limit All Channels ........................................................................................... 66
6.30.3 Limiter Release Rate ........................................................................................................... 66
6.31 Limiter Attack Rate (Address 29h) ................................................................................................ 67
6.31.1 Limiter Attack Rate .............................................................................................................. 67
6.32 ALC Enable and Attack Rate (Address 2Ah) ................................................................................ 67
6.32.1 ALCx Enable ....................................................................................................................... 67
6.32.2 ALC Attack Rate .................................................................................................................. 67
6.33 ALC Release Rate (Address 2Bh) ................................................................................................ 68
6.33.1 ALC Release Rate ............................................................................................................... 68
6.34 ALC Threshold (Address 2Ch) ..................................................................................................... 68
6.34.1 ALC Maximum Threshold .................................................................................................... 68
6.34.2 ALC Minimum Threshold ..................................................................................................... 69
6.35 Noise Gate Control (Address 2Dh) ............................................................................................... 69
6.35.1 Noise Gate All Channels ..................................................................................................... 69
6.35.2 Noise Gate Enable .............................................................................................................. 69
6.35.3 Noise Gate Threshold and Boost ........................................................................................ 70
6.35.4 Noise Gate Delay Timing .................................................................................................... 70
6.36 Status (Address 2Eh) (Read Only) ............................................................................................... 70
6.36.1 Serial Port Clock Error (Read Only) .................................................................................... 70
6.36.2 DSP Engine Overflow (Read Only) ..................................................................................... 71
6.36.3 PCMx Overflow (Read Only) ...............................................................................................71
6.36.4 ADCx Overflow (Read Only) ...............................................................................................71
6.37 Battery Compensation (Address 2Fh) .......................................................................................... 71
6.37.1 Battery Compensation ......................................................................................................... 71
6.37.2 VP Monitor ........................................................................................................................... 71
6.37.3 VP Reference ...................................................................................................................... 72
6.38 VP Battery Level (Address 30h) (Read Only) ............................................................................... 72
6.38.1 VP Voltage Level (Read Only) ............................................................................................72
6.39 Speaker Status (Address 31h) (Read Only) ................................................................................. 72
6.39.1 Speaker Current Load Status (Read Only) ......................................................................... 72
6.39.2 SPKR/HP Pin Status (Read Only) ....................................................................................... 73
6.40 Charge Pump Frequency (Address 34h) ...................................................................................... 73
6.40.1 Charge Pump Frequency .................................................................................................... 73
7. ANALOG PERFORMANCE PLOTS ....................................................................................................74
7.1 Headphone THD+N versus Output Power Plots ............................................................................ 74
8. EXAMPLE SYSTEM CLOCK FREQUENCIES .................................................................................... 76
8.1 Auto Detect Enabled .................................................................................................................... 76
8.2 Auto Detect Disabled .................................................................................................................... 76
9. PCB LAYOUT CONSIDERATIONS ..................................................................................................... 77