Software specification

TDA7303

16/21

4.3

Data bytes (detailed description)

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

0 0 1 0 0 1 0 0

For example attenuation of 25dB on speaker RF is given by: 1 0 1 1 0 1 0 0

Table 7.

Volume

MSB

LSB

FUNCTION

0

0

B2

B1

B0

A2

A1

A0

Volume 1.25dB steps

00

0

0

0

0

1

-1.25

01

0

-2.5

0

1

1

-3.75

10

0

-5

1

0

1

-6.25

11

0

-7.5

1

1

1

-8.75

0

0

B2

B1

B0

A2

A1

A0

Volume 10dB steps

00

0

0

00

1

-10

01

0

-20

01

1

-30

10

0

-40

10

1

-50

11

0

-60

11

1

-70

Table 8.

Speaker attenuators

MSB

LSB

FUNCTION

1

0

0

B1

B0

A2

A1

A0

Speaker LF

1

0

1

B1

B0

A2

A1

A0

Speaker RF

1

1

0

B1

B0

A2

A1

A0

Speaker LR

1

1

1

B1

B0

A2

A1

A0

Speaker RR

00

0

0

0

0

1

-1.25

01

0

-2.5

0

1

1

-3.75

10

0

-5

1

0

1

-6.25

11

0

-7.5

1

1

1

-8.75

00

0

01

-10

10

-20

11

-30

11

11

1

Mute