TDA7343 Datasheet, PDF (8/14 Pages) STMicroelectronics – DIGITALLY CONTROLLED AUDIO PROCESSOR

TDA7343
DATA BYTE SPECIFICATION
X = not relevant; set to ”1” during testing
Input Selector
MSB
LSB
D7
D6
D5
D4
D3
D2
D1
D0
FUNCTION
X
X
1
0
0
0 not used
X
X
1
0
0
1 IN 2
X
X
1
0
1
0 IN 1
X
X
1
0
1
1 AM mono
X
X
1
1
0
0 not used
X
X
1
1
0
1 not used
X
X
1
1
1
0 not allowed
X
X
1
1
1
1 not allowed
X
X
1
0
0
11.25dB gain
X
X
1
0
1
7.5dB gain
X
X
1
1
0
3.75dB gain
X
X
1
1
1
0dB gain
For example to select the IN 2 input with a gain of 7.5dB the Data Byte is: X X 1 0 1 0 0 1
Loudness
MSB
LSB
D7
D6
D5
D4
D3
D2
D1
D0
X
X
X
0
0
0
0
0
X
X
X
0
0
0
0
1
X
X
X
0
0
0
1
0
X
X
X
0
0
0
1
1
X
X
X
0
0
1
0
0
X
X
X
0
0
1
0
1
X
X
X
0
0
1
1
0
X
X
X
0
0
1
1
1
X
X
X
0
1
0
0
0
X
X
X
0
1
0
0
1
X
X
X
0
1
0
1
0
X
X
X
0
1
0
1
1
X
X
X
0
1
1
0
0
X
X
X
0
1
1
0
1
X
X
X
0
1
1
1
0
X
X
X
0
1
1
1
1
X
X
X
1
D3
D2
D1
D0
FUNCTION
0dB
-1.25dB
-2.5dB
-3.75dB
-5dB
-6.25dB
-7.5dB
-8.75dB
-10dB
-11.25dB
-12.5dB
-13.75dB
-15dB
-16.25dB
-17.5dB
-18.75dB
Loudness OFF (1)
For example to select -17.5dB attenuation, loudness OFF, the Data Byte is: X X X1 1 1 1 0
NOTE 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.
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