Cirrus Logic CS42L55 - Manual (Page 50)

50 DS773F1
CS42L55
6.12 ADCx Attenuator Control:
ADCAATT (Address 0Dh) & ADCBATT (Address 0Eh)
6.12.1 ADCx Volume
Sets the volume of the ADC signal.
6.13 Playback Control 1 (Address 0Fh)
6.13.1 Power Down DSP
Configures the power state of the DSP Engine.
6.13.2 HP/Line De-Emphasis
Configures a 15
μs/50μs digital de-emphasis filter response on the headphone and line outputs .
6.13.3 Playback Channels B=A
Configures independent or ganged volume control of all playback channels.
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.
7 6 5 4 3 2 1 0
ADCxATT7 ADCxATT6 ADCxATT5 ADCxATT4 ADCxATT3 ADCxATT2 ADCxATT1 ADCxATT0
ADCxATT[7:0] Volume
0111 1111 0 dB
... ...
0000 0000 0 dB
1111 1111 -1.0 dB
1111 1110 -2.0 dB
... ...
1010 0000 -96.0 dB
... ...
1000 0000 -96.0 dB
Step Size: 1.0 dB
7 6 5 4 3 2 1 0
PDN_DSP DEEMPH Reserved PLYBCKB=A INV_PCMB INV_PCMA MSTBMUTE MSTAMUTE
PDNDSP DSP Status DSP Engine Controls/Blocks
0 Powered Up 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
1 Powered Down
DEEMPH De-Emphasis Status
0 Diabled
1 Enabled
PLYBCKB=A Single Volume Control for all Playback Channels
0 Disabled; Independent channel control.
1 Enabled; Ganged channel control. Channel A volume control controls channel B volume.