CS4222_02 Datasheet, PDF (26/29 Pages) Cirrus Logic – 20-Bit Stereo Audio Codec with Volume Control

CS4222
DAC Control Byte (2)
B7
B6
B5
B4
B3
B2
B1
PDDA
MUTC
MUTR
MUTL
SOFT
0
RMP1
PDDA
Powers down DAC
0 - Normal.
1 - Power down
MUTC
Controls mute on consecutive zeros function
0 - 512 consecutive zeros will mute DAC
1 - DAC output will not mute on zeros.
MUTR-MUTL
Mute control bits
0 - Normal output level
1 - Selected DAC output muted
SOFT
Soft Mute Control
0 - Volume control changes, muting and mute-on-zeros occur with "ramp"
1 - Volume control changes, muting and mute-on-zeros occur on zero crossings
RMP1-0
Soft Volume 0.5 dB step rate
0 - 1 step per 8 LRCK's
1 - 1 step per 4 LRCK's
2 - 1 step per 16 LRCK's
3 - 1 step per 32 LRCK's
This register defaults to 00h.
Output Attenuator Data Byte (3, 4)
B7
ATT7
B6
ATT6
B5
ATT5
B4
ATT4
ATT7-ATT0
Sets attenuator level
0 - No attenuation
227 - 113.5 dB attenuation
>227 - DAC muted
ATT0 represents 0.5 dB of attenuation
This register defaults to 00h.
B3
ATT3
B2
ATT2
B1
ATT1
B0
RMP0
B0
ATT0
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DS236F1