TDA7342_06 Datasheet, PDF (15/20 Pages) STMicroelectronics – Digitally controlled audio processor

TDA7342
Software specification
Table 9. Mute
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
Function
1
0
40mV ZC Window threshold (WIN = 10)
1
1
0
20mV ZC Window threshold (WIN = 11)
Non symmetrical bass cut (note 4)
1
Symmetrical bass cut
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)
Table 10. Speaker attenuators (LF, LR, RF, RR)
MSB
D7
D6
D5
D4
D3
D2
LSB
D1
D0
Function
1.25dB step
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
0dB
-1.25dB
-2.5dB
-3.75dB
-5dB
-6.25dB
-7.5dB
-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
For example an attenuation of 25dB on a selected output is given by: X X X1 0 1 0 0
Table 11. Bass/Treble
MSB
LSB
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
1
Function
Treble step
-14dB
-12dB
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