CS42L51 Datasheet, PDF (53/83 Pages) Cirrus Logic – Low Power, Stereo CODEC with Headphone Amp

CS42L51
SOFTx
0
0
1
1
ZCROSSx
Analog PGA Volume
(PGAx_VOL[4:0])
0
Volume changes immediately.
1
Volume changes at next zero cross time.
0
Volume changes in 0.5 dB steps.
1
Volume changes in 0.5 dB steps at every
signal zero-cross.
Digital Attenuator (ADCx_ATT[7:0])
Volume changes immediately.
Volume changes immediately.
Change volume in 0.125 dB steps.
Change volume in 0.125 dB steps.
6.7 ADCx Input Select, Invert & Mute (Address 07h)
7
6
5
4
3
AINB_MUX1 AINB_MUX0 AINA_MUX1 AINA_MUX0 INV_ADCB
2
1
0
INV_ADCA ADCB_MUTE ADCA_MUTE
ADCX Input Select Bits (AINX_MUX[1:0])
Default: 00
PDN_PGAx
0
0
0
0
1
1
1
1
AINx_MUX[1:0]
Selected Path to ADC
00
AIN1x-->PGAx
01
AIN2x-->PGAx
10
AIN3x/MICINx-->PGAx
11
AIN3x/MICINx-->Pre-Amp(+16/+32 dB Gain)-->PGAx
00
AIN1x
01
AIN2x
10
AIN3x/MICINx
11
Reserved
Function:
Selects the specified analog input signal into ADCx. The microphone pre-amplifier is only available when
PDN_PGAx is disabled. See Figure 27.
AIN1x
AIN2x
AIN3x / MICINx
MUX
AIN1x
AIN2x
AIN3x
PGA
+16/
32 dB
Decoder
AINx_MUX[1:0]
PDN_PGAx
Figure 27. AIN & PGA Selection
MUX
ADC
DS679A2
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