TDA7342EQ2N Datasheet, PDF (15/21 Pages) STMicroelectronics – Digitally controlled audio processor

TDA7342EQ2N
Software specification
Table 8. Loudness
MSB
LSB
D7
D6
D5
D4
D3
D2
D1
D0
FUNCTION
X
X
X
0
0
0
0
0 0dB
X
X
X
0
0
0
0
1 -1.25dB
X
X
X
0
0
0
1
0 -2.5dB
X
X
X
0
0
0
1
1 -3.75dB
X
X
X
0
0
1
0
0 -5dB
X
X
X
0
0
1
0
1 -6.25dB
X
X
X
0
0
1
1
0 -7.5dB
X
X
X
0
0
1
1
1 -8.75dB
X
X
X
0
1
0
0
0 -10dB
X
X
X
0
1
0
0
1 -11.25dB
X
X
X
0
1
0
1
0 -12.5dB
X
X
X
0
1
0
1
1 -13.75dB
X
X
X
0
1
1
0
0 -15dB
X
X
X
0
1
1
0
1 -16.25dB
X
X
X
0
1
1
1
0 -17.5dB
X
X
X
0
1
1
1
1 -18.75dB
X
X
X
1
D3
D2
D1
D0 Loudness OFF ⁽¹⁾
1. If the loudness is switched OFF, the loudness stage is acting like a volume attenuator with flat frequency
response. D0 to D3 determine the attenuation level.
For example to select -17.5dB attenuation, loudness OFF, the Data Byte is: X X X1 1 1 1 0
Table 9. Mute
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
FUNCTION
1 Soft Mute On
0
1 Soft Mute with fast slope (I = I_MAX)
1
1 Soft Mute with slow slope (I = I_MIN)
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)
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