CS42418_05 Datasheet, PDF (53/73 Pages) Cirrus Logic – 110 dB, 192 kHz 8-Ch Codec with PLL

6.12 Volume Control (addresses 0Fh, 10h, 11h, 12h, 13h, 14h, 15h, 16h)
7
xx_VOL7
6
xx_VOL6
5
xx_VOL5
4
xx_VOL4
3
xx_VOL3
2
xx_VOL2
1
xx_VOL1
CS42418
0
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
10110100
Decimal Value
0
40
80
120
180
Volume Setting
0 dB
-20 dB
-40 dB
-60 dB
-90 dB
Table 13. Example Digital Volume Settings
6.13 Channel Invert (address 17h)
7
INV_B4
6
INV_A4
5
INV_B3
4
INV_A3
3
INV_B2
2
INV_A2
1
INV_B1
0
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)
Mixing Control Pair 4 (Channels A4 & B4)(address 1Bh)
7
Px_A=B
6
Reserved
5
Reserved
4
Px_ATAPI4
3
Px_ATAPI3
2
Px_ATAPI2
1
Px_ATAPI1
0
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.
DS603F1
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