2 volume and mixing control (address 02h), 3 channel a volume control (address 03h), 4 channel b volume control (address 04h) – Cirrus Logic CS4391 User Manual
Page 15: Cs4391
CS4391
DS335PP4
15
3.2
VOLUME AND MIXING CONTROL (ADDRESS 02H)
A = B (Channel A Volume = Channel B Volume)
Default = ‘0’.
0 - AOUTA volume is determined by register 03h and AOUTB volume is determined by reg-
ister 04h.
1 - AOUTA and AOUTB volumes are determined by register 03h and register 04h is ig-
nored.
Soft & Zero Cross (Soft control and zero cross detection control)
Default = ‘10’.
SoftZero CrossMode
00
Changes take effect immediately
01
Changes take effect on zero crossings
10
Changes take effect with a soft ramp (default)
11
Changes take effect in 1/8 dB steps on each zero crossing
ATAPI 0-4 (Channel mixing and muting). SeeTable 6
Default = ‘01001’, (Stereo)
AOUTA = Left Channel
AOUTB = Right Channel
3.3
CHANNEL A VOLUME CONTROL (ADDRESS 03H)
See
Channel B Volume Control (address 04h)
3.4
CHANNEL B VOLUME CONTROL (ADDRESS 04H)
MUTE
Default = ‘0’
0 - Disabled
1 - Enabled
Volume
Default = ‘0’
(Refer to Table 7)
7
6
5
4
3
2
1
0
A = B
Soft
Zero Cross
ATAPI4
ATAPI3
ATAPI2
ATAPI1
ATAPI0
0
1
0
0
1
0
0
1
7
6
5
4
3
2
1
0
MUTE
VOL6
VOL5
VOL4
VOL3
VOL2
VOL1
VOL0
0
0
0
0
0
0
0
0