STA015B datasheet(21/44 Pages) STMICROELECTRONICS

21 / 44 page

DLA register is used to attenuate the level of

audio output at the Left Channel using the butter-

fly shown in Fig. 18. When the register is set to

255

(0xFF),

the

maximum

attenuation

achieved.

A decimal unit correspond to an attenuation step

of 1 dB.

DLB

Address: 0x47 (71)

Type: R/W

Software Reset: 0xFF

Hardware Reset: 0xFF

MSB

LSB

Description

DLB7

DLB6

DLB5

DLB4

DLB3

DLB2

DLB1

DLB0

OUTPUT ATTENUATION

0000000

NO ATTENUATION

0000000

-1dB

0000001

-2dB

:::

:::::

0110000

-96dB

DLB register is used to re-direct the Left Channel

on the Right, or to mix both the Channels.

Default value is 0x00, corresponding at the maxi-

mum attenuation in the re-direction channel.

DLA

Output Left Channel

DSP Left Channel

DLB

DRA

Output Right Channel

DSP Right Channel

DRB

D97AU667

Figure 18. Volume Control and Output Setup

DRA

Address: 0x48 (72)

Type: R/W

Software Reset: 0X00

Hardware Reset: 0X00

MSB

LSB

Description

DRA7

DRA6

DRA5

DRA4

DRA3

DRA2

DRA1

DRA0

OUTPUT ATTENUATION

0000000

NO ATTENUATION

0000000

-1dB

0000001

-2dB

:::

:::::

0110000

-96dB

DRA register is used to attenuate the level of

audio output at the Right Channel using the but-

terfly shown in Fig. 11. When the register is set to

255

(0xFF),

the

maximum

attenuation

achieved.

A decimal unit correspond to an attenuation step

of 1 dB.

STA015-STA015B-STA015T

21/44

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