CS42L55 Datasheet, PDF (50/73 Pages) Cirrus Logic – Ultra Low Power, Stereo CODEC w/Class H Headphone Amp

6.12 ADCx Attenuator Control:
ADCAATT (Address 0Dh) & ADCBATT (Address 0Eh)
7
ADCxATT7
6
ADCxATT6
5
ADCxATT5
4
ADCxATT4
3
ADCxATT3
2
ADCxATT2
6.12.1 ADCx Volume
Sets the volume of the ADC signal.
ADCxATT[7:0]
0111 1111
...
0000 0000
1111 1111
1111 1110
...
1010 0000
...
1000 0000
Step Size:
Volume
0 dB
...
0 dB
-1.0 dB
-2.0 dB
...
-96.0 dB
...
-96.0 dB
1.0 dB
CS42L55
1
ADCxATT1
0
ADCxATT0
6.13 Playback Control 1 (Address 0Fh)
7
PDN_DSP
6
DEEMPH
5
Reserved
4
PLYBCKB=A
3
INV_PCMB
2
INV_PCMA
1
MSTBMUTE
0
MSTAMUTE
6.13.1 Power Down DSP
Configures the power state of the DSP Engine.
PDNDSP
0
1
DSP Status
Powered Up
Powered Down
DSP Engine Controls/Blocks
AMIXxMUTE (“ADC Mixer Channel x Mute” on page 51)
AMIXxVOL[6:0] (“ADC Mixer Channel x Volume” on page 51)
PMIXxMUTE (“PCM Mixer Channel x Mute” on page 52)
PMIXxVOL[6:0] (“PCM Mixer Channel x Volume” on page 52)
Beep Generator, Tone Control, De-Emphasis
6.13.2 HP/Line De-Emphasis
Configures a 15μs/50μs digital de-emphasis filter response on the headphone and line outputs.
DEEMPH
0
1
De-Emphasis Status
Diabled
Enabled
6.13.3 Playback Channels B=A
Configures independent or ganged volume control of all playback channels.
PLYBCKB=A
0
1
Single Volume Control for all Playback Channels
Disabled; Independent channel control.
Enabled; Ganged channel control. Channel A volume control controls channel B volume.
Note: This function does not affect the AMIXBMUTE, PMIXBMUTE or MSTBMUTE control. When mut-
ing channel A in a ganged scenario, the MUTEB must also be enabled. Muting channel A without muting
channel B in a ganged scenario may cause clipping on channel B.
50
DS773F1