CS42L52 Datasheet, PDF (29/82 Pages) Cirrus Logic – Low Power, Stereo CODEC w/Headphone & Speaker Amps

4.3
Analog Outputs
INPUTS FROM ADCA
and ADCB
Fixed Function DSP
AMIXAMUTE
AMIXBMUTE
AMIXAVOL[6:0]
AMIXBVOL[6:0]
+12dB/-51.5dB
0.5dB steps
VOL
MSTAVOL[7:0]
MSTBVOL[7:0]
+12dB/-102dB
0.5dB steps
Chnl Vol.
Settings
PMIXAMUTE
PMIXBMUTE
PMIXAVOL[6:0]
PMIXBVOL[6:0]
+12dB/-51.5dB
0.5dB steps
Demph
VOL
PCMASWAP[1:0]
PCMBSWAP[1:0]
Channel
Swap
Channel
Swap
Σ
ADCASWAP[1:0]
ADCBSWAP[1:0]
Σ
VOL
DEEMPH
INV_PCMA
INV_PCMB
OFFTIME[2:0]
ONTIME[3:0]
FREQ[3:0]
BEEP[1:0]
BEEPMIXDIS
Beep
Generator
BPVOL[4:0]
0dB/-50dB
2.0dB steps
VOL
MSTAMUTE
MSTBMUTE
DIGSFT
DIGZC
PLYBCKB=A
LIMARATE[7:0]
LIMRRATE[7:0]
LMAX[2:0]
CUSH[2:0]
LIMSRDIS
LIMZCDIS
LIMIT
Limiter
Peak
Detect
Bass/
Treble/
Control
TC_EN
BASS_CF[1:0]
TREB_CF[1:0]
BASS[3:0]
TREB[3:0]
+12.0dB/-10.5dB
1.5dB steps
Digital Mix to ADC
Serial Interface
Figure 10. DSP Engine Signal Flow
Referenced Control Register Location
DSP
DEEMPH ............................. “HP/Speaker De-Emphasis” on page 52
PMIXxMUTE........................ “PCM Mixer Channel x Mute” on page 58
PMIXxVOL[6:0].................... “PCM Mixer Channel x Volume” on page 58
INV_PCMx........................... “Invert PCM Signal Polarity” on page 51
PCMxSWAP[1:0] ................. “PCM Mix Channel Swap” on page 64
AMIXxMUTE........................ “ADC Mixer Channel x Mute” on page 58
AMIXxVOL[6:0].................... “ADC Mixer Channel x Volume” on page 58
ADCxSWAP[1:0].................. “ADC Mix Channel Swap” on page 64
MSTxVOL[7:0]..................... “Master Volume Control” on page 63
MSTxMUTE......................... “Master Playback Mute” on page 51
DIGSFT ............................... “Digital Soft Ramp” on page 53
DIGZC ................................. “Digital Zero Cross” on page 53
PLYBCKB=A........................ “Playback Volume Setting B=A” on page 51
TC_EN................................. “Tone Control Enable” on page 62
BASS_CF[1:0] ..................... “Bass Corner Frequency” on page 62
TREB_CF[1:0] ..................... “Treble Corner Frequency” on page 62
BASS[3:0]............................ “Bass Gain” on page 63
TREB[3:0]............................ “Treble Gain” on page 62
LIMIT ................................... “Peak Detect and Limiter” on page 66
LIMSRDIS ........................... “Limiter Soft Ramp Disable” on page 65
LIMZCDIS............................ “Limiter Zero Cross Disable” on page 66
LMAX[2:0]............................ “Limiter Maximum Threshold” on page 65
CUSH[2:0] ........................... “Limiter Cushion Threshold” on page 65
LIMARATE[7:0].................... “Limiter Attack Rate” on page 67
LIMRRATE[7:0] ................... “Limiter Release Rate” on page 66
CS42L52
PWM
Modulator
DAC
DS680A1
29