TDA7348 Datasheet, PDF (9/14 Pages) STMicroelectronics – DIGITALLY CONTROLLED AUDIO PROCESSOR

TDA7348
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)
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
Nonsymmetrical 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)
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
For example an attenuation of 25dB on a selected output is given by: X X X1 0 1 0 0
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