CS42L52 Datasheet, PDF (53/82 Pages) Cirrus Logic – Low Power, Stereo CODEC w/Headphone & Speaker Amps

CS42L52
6.13.5 Digital Soft Ramp
Configures an incremental volume ramp from the current level to the new level at the specified rate.
DIGSFT
0
1
Ramp Rate:
Volume Changes
Do not occur on a zero cross-
ing
Occur on a zero crossing
1/8 dB every LRCK cycle
Affected Digital Volume Controls
MSTxMUTE (“Master Playback Mute” on page 51),
HPxMUTE, SPKxMUTE (“Playback Control 2 (Address 0Fh)” on page 53),
ADCxVOL[7:0] (“ADCx Volume” on page 57),
AMIXxMUTE, AMIXxVOL[7:0] (“ADC Mixer Channel x Volume” on page 58),
PMIXxMUTE, PMIXxVOL[7:0] (“PCM Mixer Channel x Volume” on page 58),
MSTxVOL[7:0] (“Master Volume Control” on page 63),
HPxVOL[7:0] (“Headphone Volume Control” on page 63),
SPKxVOL[7:0] (“Speaker Volume Control” on page 64),
ALC and Limiter Attack/Release (page 66 to page 68)
6.13.6 Digital Zero Cross
Configures when the signal level changes occur for the digital volume controls.
DIGZC
0
1
Volume Changes
Do not occur on a zero cross-
ing
Occur on a zero crossing
Affected Digital Volume Controls
MSTxMUTE (“Master Playback Mute” on page 51),
HPxMUTE, SPKxMUTE (“Playback Control 2 (Address 0Fh)” on page 53),
ADCxVOL[7:0] (“ADCx Volume” on page 57),
AMIXxMUTE, AMIXxVOL[7:0] (“ADC Mixer Channel x Volume” on page 58),
PMIXxMUTE, PMIXxVOL[7:0] (“PCM Mixer Channel x Volume” on page 58),
MSTxVOL[7:0] (“Master Volume Control” on page 63),
HPxVOL[7:0] (“Headphone Volume Control” on page 63),
SPKxVOL[7:0] (“Speaker Volume Control” on page 64),
ALC and Limiter Attack/Release (page 66 to page 68)
Notes:
1. If the signal does not encounter a zero crossing, the requested volume change will occur after a
timeout period between 1024 and 2048 sample periods (21.3 ms to 42.7 ms at 48 kHz sample rate).
2. The zero cross function is independently monitored and implemented for each channel.
3. The DIS_LIMSFT bit (“Limiter Soft Ramp Disable” on page 65) is ignored when zero cross is enabled.
6.14 Playback Control 2 (Address 0Fh)
7
HPBMUTE
6
5
4
HPAMUTE SPKBMUTE SPKAMUTE
3
SPKB=A
2
SPKSWAP
1
0
SPKMONO MUTE50/50
6.14.1 Headphone Mute
Configures a digital mute on headphone channel x.
HPxMUTE
0
1
Headphone Mute
Disabled
Enabled
6.14.2 Speaker Mute
Configures a digital mute on speaker channel x.
SPKxMUTE
0
1
Speaker Mute
Disabled
Enabled
DS680A1
53