SOFTWARE SPECIFICATION (continued)

DATA BYTES (detailed description)

Volume

MSB

LSB

FUNCTION

0

0

B2

B1

B0

A2

A1

A0

Volume 1.25dB steps

0

0

0

0

1

1

1

1

0

0

1

1

0

0

1

1

0

1

0

1

0

1

0

1

0

-1.25

-2.5

-3.75

-5

-6.25

-7.5

-8.75

0

0

B2

B1

B0

A2

A1

A0

Volume 10dB steps

0

0

0

0

1

1

1

1

0

0

1

1

0

0

1

1

0

1

0

1

0

1

0

1

0

-10

-20

-30

-40

-50

-60

-70

For example a volume of -45dB is given by:

00100 100

Speaker Attenuators

MSB

LSB

FUNCTION

1

1

0

0

0

1

B1

B1

B0

B0

A2

A2

A1

A1

A0

A0

Speaker L

Speaker R

0

0

0

0

1

1

1

1

0

0

1

1

0

0

1

1

0

1

0

1

0

1

0

1

0

-1.25

-2.5

-3.75

-5

-6.25

-7.5

-8.75

0

0

1

1

0

1

0

1

0

-10

-20

-30

11111

Mute

For example attenuation of 25dB on speaker R is given by:

10110 100

TDA7315

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