CS42426
6.12 Volume Control (addresses 0Fh, 10h, 11h, 12h, 13h, 14h)
7
6
5
4
3
2
1
0
xx_VOL7
xx_VOL6
xx_VOL5
xx_VOL4
xx_VOL3
xx_VOL2
xx_VOL1
xx_VOL0
6.12.1 VOLUME CONTROL (XX_VOL)
Default = 0
Function:
The Digital Volume Control registers allow independent control of the signal levels in 0.5 dB incre-
ments from 0 to -127 dB. Volume settings are decoded as shown in Table 13. The volume changes
are implemented as dictated by the Soft and Zero Cross bits (SZC[1:0]). All volume settings less than
-127 dB are equivalent to enabling the MUTE bit for the given channel.
Binary Code
00000000
00101000
01010000
01111000
Decimal Value
Volume Setting
0 dB
0
40
80
120
180
-20 dB
-40 dB
-60 dB
-90 dB
10110100
Table 13. Example Digital Volume Settings
6.13 Channel Invert (address 17h)
7
6
5
4
3
2
1
0
Reserved
Reserved
INV_B3
INV_A3
INV_B2
INV_A2
INV_B1
INV_A1
6.13.1 INVERT SIGNAL POLARITY (INV_XX)
Default = 0
0 - Disabled
1 - Enabled
Function:
When enabled, these bits will invert the signal polarity of their respective channels.
6.14 Mixing Control Pair 1 (Channels A1 & B1)(address 18h)
Mixing Control Pair 2 (Channels A2 & B2)(address 19h)
Mixing Control Pair 3 (Channels A3 & B3)(address 1Ah)
7
6
5
4
3
2
1
0
Px_A=B
Reserved
Reserved
Px_ATAPI4
Px_ATAPI3
Px_ATAPI2
Px_ATAPI1
Px_ATAPI0
6.14.1 CHANNEL A VOLUME = CHANNEL B VOLUME (PX_A=B)
Default = 0
0 - Disabled
1 - Enabled
Function:
The AOUTAx and AOUTBx volume levels are independently controlled by the A and the B Channel
Volume Control registers when this function is disabled. The volume on both AOUTAx and AOUTBx
are determined by the A Channel Volume Control registers (per A-B pair), and the B Channel Volume
Control registers are ignored when this function is enabled.
DS604F1
53
CIRRUS [ CIRRUS LOGIC ]
