TDA7432 Datasheet, PDF (6/10 Pages) STMicroelectronics – BASIC FUNCTION AUDIO PROCESSOR

TDA7432
SUBADDRESS (receive mode)
MSB
X
X
X
LSB
I
A3 A2 A1 A0
FUNCTION
0
0
0
0 Input selector
0
0
0
1 Volume
0
0
1
0 Bass, Treble
0
0
1
1 Speaker attenuator LF
0
1
0
0 Speaker attenuator LR
0
1
0
1 Speaker attenuator RF
0
1
1
0 Speaker attenuator RR
0
1
1
1 Loudness
I = Auto increment
X = Not used
DATA BYTE SPECIFICATION
X = not relevant; set to ”1” during testing
Input Selector
MSB
LSB
D₇
D₆
D₅
D₄
D₃
D₂
D₁
D₀
FUNCTION
0
0
0 IN
0
0
1 not used
0
1
0 mono
0
1
1 no input selected
1
X
X mute (low homic)
0
non-symmetrical bass cut (note 1)
1
symmetrical bass cut
0
extended bass range
1
standard bass range ±14dB
For example to select the MONO input the Data Byte is: X X X X 0 1 0.
An additional direct mute function is included in the Speaker Attenuators.
Note 1: Bass cut for very low frequencies.
MSB
LSB
D₇(*) D₆
D₅
D₄
D₃
D₂
D₁
D₀
1
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
+32dB
+16dB
0dB
-16dB
-32dB
-48dB
-64dB
1
0
0
0
0 0dB
1
0
0
0
1 -1dB
1
0
0
1
0 -2dB
1
1
1
1
1
1 -15dB
VOLUME
(*) Loudness = ON
Note 2:
It is not recommended to use a gain more than 20dB for system performance reason. In general, the max. gain should be limited by
software to the maximum value, which is needed for the system.
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