1 mic preamp x volume, 2 pgax volume, Mic 2, address 16h) – Cirrus Logic CS42L73 User Manual
Page 98: 1 mic preamp x volume 6.19.2 pgax volume, P 98, Preampb[1:0] and pgabvol[5:0, Mic preamp, Cs42l73
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98
DS882F1
CS42L73
6.19 Mic PreAmp and PGA Volume Control:
Channel A (Mic 1, Address 15h) and Channel B (Mic 2, Address 16h)
6.19.1 Mic PREAMP x Volume
Sets the gain of the mic preamp on channel x.
6.19.2 PGAx Volume
Normally, this control sets the attenuation/gain of the PGA on channel x. When the ALC is engaged, it
sets the maximum volume.
Note: The step size may deviate slightly from 0.5 dB. Refer to Figures
on page
7
6
5
4
3
2
1
0
Reserved
MIC_PREAMPx
PGAxVOL5
PGAxVOL4
PGAxVOL3
PGAxVOL2
PGAxVOL1
PGAxVOL0
MIC_PREAMPx
Volume
0
+10 dB
1
+20 dB
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 1010
-3.0 dB (Target setting for 600 mVrms analog input amplitude)
...
...
11 0100
-6.0 dB
...
...
10 0000
-6.0 dB
Step Size:
0.5 dB
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