TDA7348_07 Datasheet, PDF (13/20 Pages) STMicroelectronics – Digitally controlled audio processor

TDA7348
4.3
Transmitted data
Table 6. Send mode
MSB
X
X
X
X
X
ZM = Zero crossing muted (HIGH active)
SM = Soft mute activated (HIGH active)
X = Not used
The transmitted data is automatically updated after each ACK.
Transmission can be repeated without new chip address.
Software specification
LSB
SM
ZM
X
4.4
Data byte specification
X = not relevant; set to "1" during testing
Table 7.
MSB
Input Selector
D7
D6
D5
D4
D3
D2
X
X
1
0
X
X
1
0
X
X
1
0
X
X
1
0
X
X
1
1
X
X
1
1
X
X
1
1
X
X
1
1
X
X
1
0
0
X
X
1
0
1
X
X
1
1
0
X
X
1
1
1
LSB
D1
D0
Function
0
0 not used
0
1 IN 2
1
0 IN 1
1
1 AM mono
0
0 not used
0
1 IN 3
1
0 not allowed
1
1 not allowed
11.25dB gain
7.5dB gain
3.75dB gain
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
Table 8. Loudness
MSB
LSB
D7
D6
D5
D4
D3
D2
D1
D0
Function
X
X
X
1
0
0
0
0 0dB
X
X
X
1
0
0
0
1 -1.25dB
X
X
X
1
0
0
1
0 -2.5dB
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