CS42428 datasheet(53/73 Pages) CIRRUS

53 / 73 page

DS605F1

CS42428

6.12

Volume Control (addresses 0Fh, 10h, 11h, 12h, 13h, 14h, 15h, 16h)

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.

6.13

Channel Invert (address 17h)

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)

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.

432

xx_VOL7

xx_VOL6

xx_VOL5

xx_VOL4

xx_VOL3

xx_VOL2

xx_VOL1

xx_VOL0

Binary Code

Decimal Value

Volume Setting

00000000

0 dB

00101000

-20 dB

01010000

-40 dB

01111000

120

-60 dB

10110100

180

-90 dB

Table 13. Example Digital Volume Settings

432

INV_B4

INV_A4

INV_B3

INV_A3

INV_B2

INV_A2

INV_B1

INV_A1

432

Px_A=B

Reserved

Px_ATAPI4

Px_ATAPI3

Px_ATAPI2

Px_ATAPI1

Px_ATAPI0

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