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CS42L56 View Datasheet(PDF) - Cirrus Logic

Part Name
Description
MFG CO.
'CS42L56' PDF : 92 Pages View PDF
6.26 Gain & Bias Control (Address 1Dh)
7
PREAMPB1
6
PREAMPB0
5
PREAMPA1
4
PREAMPA0
6.26.1 PGA x Preamplifier Gain
Configures the gain of the PGA x preamp.
PREAMPx[1:0]
00
01
10
11
PGA x Preamp Gain
0 dB
+10 dB
+20 dB
Reserved
3
BOOSTB
CS42L56
2
BOOSTA
1
BIAS_LVL1
0
BIAS_LVL0
6.26.2 Boostx
Configures a +20 dB digital boost on ADC channel x.
BOOSTx
0
1
+20 dB Boost
No boost applied
+20 dB digital boost applied
6.26.3 Microphone Bias Output Level
Configures the voltage level of the microphone bias output.
BIAS_LVL[1:0]
00
01
10
11
MIC Bias Output Level
0.9xVA
0.8xVA
0.7xVA
0.6xVA
6.27 PGA x MUX, Volume: PGA A (Address 1Eh) & PGA B (Address 1Fh)
7
PGAxMUX1
6
PGAxMUX0
5
PGAxVOL5
4
PGAxVOL4
3
PGAxVOL3
2
PGAxVOL2
1
PGAxVOL1
0
PGAxVOL0
6.27.1 PGA x Input Select
Selects the specified analog input signal into PGA channel x.
PGAxMUX[1:0]
00
01
10
11
Selected Input to PGAx
AIN1x.
AIN2x.
AIN3x.
Reserved
Note: For pseudo-differential inputs, the CODEC automatically chooses the respective pseudo-ground
(AIN1REF or AIN2REF) for each input selection.
Use the AINx_REF bits (Analog Input 1 x Reference Configuration and “Analog Input 1 x Reference Con-
figuration” on page 74) to properly configure the input channel.
76
DS851F2
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