CS42L55 Datasheet, PDF (23/73 Pages) Cirrus Logic – Ultra Low Power, Stereo CODEC w/Class H Headphone Amp

4.2 Analog Inputs
CS42L55
DIGMUX
DIGSUM[1:0]
Swap/
Mix
BOOSTA
ADCAMUTE
DIGSFT
ADCAATT[7:0]
ADCB=A
HPFRZA
HPFA
HPFA_CF[1:0]
PDN_ADCA
INV_ADCA
PDN_CHRG
Gain Adjust
ADC
ALCA
ALCASRDIS
ALCAZCDIS
ALCARATE[5:0]
ALCRRATE[5:0]
MAX[2:0]
MIN[2:0]
ALC
ALCB
ALCBSRDIS
ALCBZCDIS
ADCAMUX[1:0]
No_`ise Gate
NGALL
NG
THRESH[3:0]
NGDELAY[1:0]
PDN_ADCA
PGAAVOL[5:0]
PGAB=A
ANLGZC
PDN_ADCB
PGABVOL[5:0]
PGAB=A
ANLGZC
ADCBMUX[1:0]
Gain Adjust
ADC
BOOSTB
ADCBMUTE
DIGSFT
ADCBATT[7:0]
ADCB=A
HPFRZB
HPB
HPFB_CF[1:0]
PDN_ADCB
INV_ADCB
PDN_CHRG
PGAAMUX
PGABMUX
AIN1A
AIN2A
AIN1REF
AIN2REF
AIN2B
AIN1B
Referenced Control
Analog Front End
PGAxMUX
PDN_ADCx
PGAxVOL[5:0]
PGAB=A
ANLGZCx
ADCxMUX[1:0]
INV_ADCx
PDN_CHRG
HPFRZx
HPFx
HPFx_CF[1:0]
Digital Volume
BOOSTx
ADCxMUTE
ADCxATT[7:0]
DIGSFT
ADCB=A
ALCx
ALCxSRDIS
ALCxZCDIS
ALCARATE[5:0]
ALCRRATE[5:0]
MAX[2:0]
MIN[2:0]
NGALL
NG
THRESH[3:0]
NGDELAY[1:0]
Miscellaneous
DIGSUM[1:0]
DIGMUX
TO DSP Engine
FROM DSP ENGINE
Figure 9. Analog Input Signal Flow
Register Location
“PGA x Input Select” on page 49
“Power Down ADC x” on page 42
“PGAx Volume” on page 49
“PGA Channel B=A” on page 48
“Analog Zero Cross” on page 46
“ADC x Input Select” on page 46
“Invert ADC Signal Polarity” on page 48
“Power Down ADC Charge Pump” on page 42
“ADCx High-Pass Filter Freeze” on page 47
“ADCx High-Pass Filter” on page 47
“HPF x Corner Frequency” on page 47
“Boostx” on page 49
“ADC Mute” on page 48
“ADCx Volume” on page 50
“Digital Soft Ramp” on page 46
“ADC Channel B=A” on page 48
“ALCx” on page 62
“ALCx Soft Ramp Disable” on page 65
“ALCx Zero Cross Disable” on page 65
“ALC Attack Rate” on page 63
“ALC Release Rate” on page 63
“ALC Maximum Threshold” on page 64
“ALC Minimum Threshold” on page 64
“Noise Gate All Channels” on page 64
“Noise Gate Enable” on page 65
“Noise Gate Threshold and Boost” on page 65
“Noise Gate Delay Timing” on page 65
“Digital Sum” on page 48
“Digital MUX” on page 45
ANALOG PASSTHRU TO
HEADPHONE, LINE AMPLIFIER MUX
DS773F1
23