1 boostx, 2 pga x input select, 3 pgax volume – Cirrus Logic CS42L55 User Manual
Page 49: P 49, Mux bit, To sele, Cs42l55
DS773F1
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CS42L55
6.11
PGA x MUX, Volume:
PGA A (Address 0Bh) & PGA B (Address 0Ch)
6.11.1
Boostx
Configures a +20 dB boost on channel x.
6.11.2
PGA x Input Select
Selects the specified analog input signal into PGA channel x.
Note:
For pseudo-differential inputs, the CODEC automatically chooses the respective pseudo-ground
(AIN1REF or AIN2REF) for each input selection.
6.11.3
PGAx Volume
Sets the volume/gain of the Programmable Gain Amplifier (PGA).
Notes:
1.
Refer to
for differential and integral nonlinearity (DNL and INL).
7
6
5
4
3
2
1
0
BOOSTx
PGAxMUX
PGAxVOL5
PGAxVOL4
PGAxVOL3
PGAxVOL2
PGAxVOL1
PGAxVOL0
BOOSTx
+20 dB Boost
0
No boost applied
1
+20 dB boost applied
PGAxMUX
Selected Input to PGAx
0
AIN1x
1
AIN2x
PGAxVOL[5:0]
Volume
01 1111
12 dB
...
...
01 1000
12 dB
...
...
00 0001
+0.5 dB
00 0000
0 dB
11 1111
-0.5 dB
...
...
11 0100
-6.0 dB
...
...
10 0000
-6.0 dB
Step Size:
0.5 dB