Software specification

TDA7342EQ2N

16/21

An additional direct mute function is included in the Speaker Attenuators.

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

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

1

Symmetrical Bass Cut

1.

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

Table 10.

Speaker attenuators

MSB

LSB

SPEAKER ATTENUATOR LF, LR, RF, RR

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