STA323W datasheet(50/77 Pages) STMICROELECTRONICS

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STA323W

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7.7

Volume control

7.7.1

Master controls

Master mute register (address 0x06)

Master volume register (Address 0x07)

Note:

The value of volume derived from MV is dependent on the AMV AutoModes™ volume

settings.

7.7.2

Channel controls

Channel 1 volume (address 0x08)

Channel 2 volume (address 0x09)

Channel 3 volume (address 0x0A)

7.7.3

Volume description

The volume structure of the STA323W consists of individual volume registers for each of the

three channels and a master volume register, and individual channel volume trim registers.

The channel volume settings are normally used to set the maximum allowable digital gain

and to hard-set gain differences between certain channels. These values are normally set at

the initialization of the IC and not changed. The individual channel volumes are adjustable in

0.5-dB steps from +48 dB to -80 dB. The master volume control is normally mapped to the

master volume of the system. The values of these two settings are summed to find the

actual gain or volume value for any given channel.

Reserved

MMUTE

000

MV7

MV6

MV5

MV4

MV3

MV2

MV1

MV0

111

11111

C1V7

C1V6

C1V5

C1V4

C1V3

C1V2

C1V1

C1V0

000

C2V7

C2V6

C2V5

C2V4

C2V3

C2V2

C2V1

C2V0

000

C3V7

C3V6

C3V5

C3V4

C3V3

C3V2

C3V1

C3V0

000

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