TSCS42xx
Portable Consumer CODEC
1. OVERVIEW ..............................................................................................................................14
1.1. Block Diagram ................................................................................................................................. 14
1.2. Audio Outputs .................................................................................................................................. 14
1.3. Audio Inputs ..................................................................................................................................... 15
2. POWER MANAGEMENT .........................................................................................................16
2.1. Control Registers ............................................................................................................................. 16
2.1.1. Power Management Register 1 ......................................................................................... 16
2.1.2. Power Management 2 Register ........................................................................................ 17
2.2. Stopping the Master Clock ............................................................................................................... 17
3. OUTPUT AUDIO PROCESSING .............................................................................................18
3.1. DC Removal .................................................................................................................................... 18
3.2. Volume Control ................................................................................................................................ 19
3.2.1. Volume Control Registers .................................................................................................. 20
3.3. Parametric Equalizer ....................................................................................................................... 21
3.3.1. Prescaler & Equalizer Filter ............................................................................................... 21
3.3.2. EQ Filter Enable Register ................................................................................................. 22
3.3.3. DACCRAM Write/Read Registers ...................................................................................... 22
3.3.3.1. DAC Coefficient Write Data Low Register ....................................................... 22
3.3.3.2. DAC Coefficient Write Data Mid Register ....................................................... 22
3.3.3.3. DAC Coefficient WRITE Data High Register ................................................... 23
3.3.3.4. DAC Coefficient Read Data Low Register ....................................................... 23
3.3.3.5. DAC Coefficient Read Data Mid Register ........................................................ 23
3.3.3.6. DAC Coefficient Read Data High Register ...................................................... 23
3.3.4. DACCRAM Address Register ............................................................................................ 24
3.3.5. DACCRAM STATUS Register ........................................................................................... 24
3.3.6. Equalizer, Bass, Treble Coefficient & Equalizer Prescaler RAM ....................................... 24
3.4. Gain and Dynamic Range Control ................................................................................................... 28
3.5. Multi-band Compressor ................................................................................................................... 29
3.5.1. Overview ............................................................................................................................ 29
3.5.2. Multi band Compressor Registers ...................................................................................... 31
3.6. Limiter/Compressor/Expander ......................................................................................................... 38
3.6.1. Overview ............................................................................................................................ 38
3.6.2. Configuration ...................................................................................................................... 39
3.6.3. Controlling parameters ....................................................................................................... 40
3.6.4. Limiter/Compressor/Expander Registers ........................................................................... 40
3.6.4.1. General compressor/limiter/expander control Register .................................... 40
3.6.4.2. Compressor/Limiter/Expander make-up gain Register .................................... 41
3.6.4.3. Compressor Threshold Register ....................................................................... 41
3.6.4.4. Compressor ration register ............................................................................... 41
3.6.4.5. Compressor Attack Time Constant Register (Low) .......................................... 41
3.6.4.6. Compressor Attack Time Constant Register (High) ......................................... 42
3.6.4.7. Compressor Release Time Constant Register (Low) ....................................... 42
3.6.4.8. Compressor Release Time Constant Register (High) ...................................... 42
3.6.4.9. Limiter Threshold Register ............................................................................... 42
3.6.4.10. Limiter Target Register ................................................................................... 43
3.6.4.11. Limiter Attack Time Constant Register (Low) ................................................. 43
3.6.4.12. Limiter Attack Time Constant Register (High) ................................................ 43
3.6.4.13. Limiter Release Time Constant Register (Low) .............................................. 43
3.6.4.14. Limiter Release Time Constant Register (High) ............................................. 44
3.6.4.15. Expander Threshold Register ......................................................................... 44
3.6.4.16. Expander Ratio Register ................................................................................ 44
3.6.4.17. Expander Attack Time Constant Register (Low) ............................................ 44
3.6.4.18. Expander Attack Time Constant Register (High) ............................................ 45
3.6.4.19. Expander Release Time Constant Register (Low) ......................................... 45
3.6.4.20. Expander Release Time Constant Register (High) ........................................ 45
3.7. Output Effects .................................................................................................................................. 45
3.7.1. FX Control Register ........................................................................................................... 46
3.7.2. Stereo Depth (3-D) Enhancement ..................................................................................... 46
3.7.3. Psychoacoustic Bass Enhancement .................................................................................. 47
©2018 TEMPO SEMICONDUCTOR, INC.
2
V 1.5 3/27/2018
TSCS42xx
