Software specification

TDA7348

14/20

For example to select -17.5dB attenuation, loudness OFF, the Data Byte is: X X X1 1 1 1 0

X

X

X

1

0

0

1

1

-3.75dB

X

X

X

1

0

1

0

0

-5dB

X

X

X

1

0

1

0

1

-6.25dB

X

X

X

1

0

1

1

0

-7.5dB

X

X

X

1

0

1

1

1

-8.75dB

X

X

X

1

1

0

0

0

-10dB

X

X

X

1

1

0

0

1

-11.25dB

X

X

X

1

1

0

1

0

-12.5dB

X

X

X

1

1

0

1

1

-13.75dB

X

X

X

1

1

1

0

0

-15dB

X

X

X

1

1

1

0

1

-16.25dB

X

X

X

1

1

1

1

0

-17.5dB

X

X

X

1

1

1

1

1

-18.75dB

Table 9.

Mute

MSB

LSB

Function

D7

D6

D5

D4

D3

D2

D1

D0

1

Soft mute on

0

1

Soft mute with fast slope (I = IMAX)

1

1

Soft mute with slow slope (I = IMIN)

1

Direct mute

0

1

Zero crossing mute on

0

0

Zero crossing mute off

(delayed until next zerocrossing)

1

Zero crossing mute and pause detector

reset

0

0

160mV ZC window threshold (WIN = 00)

0

1

80mV ZC window threshold (WIN = 01)

1

0

40mV ZC window threshold (WIN = 10)

1

1

20mV ZC window threshold (WIN = 11)

0

Non-symmetrical Bass Cut

1

Symmetrical Bass Cut

Table 8.

Loudness (continued)

MSB

LSB

Function

D7

D6

D5

D4

D3

D2

D1

D0