CS4222
DAC Control Byte (2)
B7
PDDA
B6
MUTC
B5
MUTR
B4
MUTL
B3
SOFT
B2
0
B1
RMP1
B0
RMP0
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
SOFT
Mute control bits
0 - Normal output level
1 - Selected DAC output muted
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
B6
B5
B4
B3
B2
B1
B0
ATT7
ATT6
ATT5
ATT4
ATT3
ATT2
ATT1
ATT0
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.
26
DS236F1
CIRRUS [ CIRRUS LOGIC ]
