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TDA7409

2.5 DATA BYTE SPECIFICATION

2.5.1 Input Selector / Gain

2.5.2 Loudness

Note 1: The attenuation is specified at high frequencies. Around the center frequency the value is different depending on the programmed

attenuation (see Loudness-frequency-response).

MSB

LSB

FUNCTION

0

0

0

0

1

1

1

1

0

0

1

1

0

0

1

1

0

1

0

1

0

1

0

1

Source Selector

Not used

Single Ended 1

Mute

Single Ended 2

Single Ended 4

Single Ended 3

Mute

Beep

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

X

X

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

X

X

0

0

1

1

0

0

1

1

0

0

1

1

0

0

1

1

X

X

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

Input Gain

0dB

1dB

2dB

3dB

4dB

5dB

6dB

7dB

8dB

9dB

10dB

11dB

12dB

13dB

14dB

16dB

18dB

20dB

MSB

LSB

LOUDNESS

0

0

:

1

1

0

0

:

1

1

0

0

:

1

1

0

1

:

0

1

Attenuation

0dB

-1 dB

:

-14 dB

-15 dB

00

0

1

1

0

1

0

1

Filter / Center Frequency

off(flat) 'D6 must be = 0'

400Hz

800Hz

2.4KHz

0

1

Shape

Low Boost

Low & High Boost

0

1

SoftStep-Volume

off

on