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PT2315A V1.1

- 9 -

December, 2006

2-Channel Audio Processor IC

PT2315A

SPEAKER ATTENUATORS

The table below gives a detailed description of the speaker attenuators data bytes. For example, an

attenuation of 30dB on the Speaker L (Left) is given by 1 0 0 1 1 0 0 0.

MSB

LSB

Function

1

0

0

B1

B0

A2

A1

A0

Speaker L

1

0

1

B1

B0

A2

A1

A0

Speaker R

0

0

0

0

0

0

1

-1.25

0

1

0

-2.5

0

1

1

-3.75

1

0

0

-5

1

0

1

-6.25

1

1

0

-7.5

1

1

1

-8.75

0

0

0

0

1

-10

1

0

-20

1

1

-30

1

1

1

1

1

Mute

LOUDNESS FUNCTION

The following table shows the detailed description of the Loudness Function. For example, when the

Loudness Function is turned ON, the code format is 0 1 0 0 0 0 0 0

MSB

LSB

Function

0

1

0

*

*

L

*

*

Loudness Control

0

Loudness ON

1

Loudness OFF

Note: *=No Effect