TDA7342

Software specification

15/20

An additional direct mute function is included in the speaker attenuators.

Note 4: Bass cut for very low frequencies; should not be used at +16 and +18dB bass boost (DC gain)

For example an attenuation of 25dB on a selected output is given by: X X X1 0 1 0 0

1

0

40mV ZC Window threshold (WIN = 10)

1

1

20mV ZC Window threshold (WIN = 11)

0

Non symmetrical bass cut (note 4)

1

Symmetrical bass cut

Table 10.

MSB

LSB

Function

D7

D6

D5

D4

D3

D2

D1

D0

1.25dB step

X

X

X

0

0

0

0dB

X

X

X

0

0

1

-1.25dB

X

X

X

0

1

0

-2.5dB

X

X

X

0

1

1

-3.75dB

X

X

X

1

0

0

-5dB

X

X

X

1

0

1

-6.25dB

X

X

X

1

1

0

-7.5dB

X

X

X

1

1

1

-8.75dB

10dB step

X

X

X

0

0

0dB

X

X

X

0

1

-10dB

X

X

X

1

0

-20dB

X

X

X

1

1

-30dB

X

X

X

1

1

1

1

1

Speaker mute

Table 11.

Bass/Treble

MSB

LSB

Function

D7

D6

D5

D4

D3

D2

D1

D0

Treble step

0

0

0

0

-14dB

0

0

0

1

-12dB

Table 9.

Mute

MSB

LSB

Function

D7

D6

D5

D4

D3

D2

D1

D0