Cirrus Logic CS43L22 - Manual (Page 45)

DS792F2 45
CS43L22
Confidential Draft
3/4/10
7.11.6 Digital Zero Cross
Configures when the signal level changes occur for the digital volume controls.
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 53 ) is ignored when zero cross is enabled.
7.12 Playback Control 2 (Address 0Fh)
7.12.1 Headphone Mute
Configures a digital mute on headphone channel x.
7.12.2 Speaker Mute
Configures a digital mute on speaker channel x.
7.12.3 Speaker Volume Setting B=A
Configures independent or ganged volume control of the speaker volume. Mute is not affected.
7.12.4 Speaker Channel Swap
Configures a channel swap on the speaker channels.
DIGZC Volume Changes Affected Digital Volume Controls
0
Do not occur on a zero cross-
ing MSTxMUTE ( “Master Playback Mute” on page 43 ),
HPxMUTE, SPKxMUTE ( “Playback Control 2 (Address 0Fh)” on page 45 ),
PCMxMUTE, PCMxVOL[7:0] ( “PCM Channel x Volume” on page 47 ),
MSTxVOL[7:0] ( “Master Volume Control” on page 51 ),
HPxVOL[7:0] ( “Headphone Volume Control” on page 51 ),
SPKxVOL[7:0] ( “Speaker Volume Control” on page 52 ),
1 Occur on a zero crossing
7 6 5 4 3 2 1 0
HPBMUTE HPAMUTE SPKBMUTE SPKAMUTE SPKB=A SPKSWAP SPKMONO MUTE50/50
HPxMUTE Headphone Mute
0 Disabled
1 Enabled
SPKxMUTE Speaker Mute
0 Disabled
1 Enabled
SPKB=A Single Volume Control for the Speaker Channel
0 Disabled
1 Enabled
SPKSWAP Speaker Output
0 Channel A
1 Channel B
Application: “Mono Speaker Output Configuration” on page 27