TDA7342_06 Datasheet, PDF (13/20 Pages) STMicroelectronics – Digitally controlled audio processor

TDA7342
Software specification
4.3
Transmitted data
Table 6. Send mode
MSB
LSB
X
X
X
X
X
SM
ZM
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.
4.4
Data byte specification
X = not relevant; set to "1" during testing
Table 7. Input selector
MSB
LSB
D7
D6
D5
D4
D3
D2
D1
D0
Function
0
1
0
0
0 not used
0
1
0
0
1 IN 2
0
1
0
1
0 IN 1
0
1
0
1
1 AM mono
0
1
1
0
0 not used
0
1
1
0
1 not used
0
1
1
1
0 not allowed
0
1
1
1
1 not allowed
0
1
0
0
11.25dB gain
0
1
0
1
7.5dB gain
0
1
1
0
3.75dB gain
0
1
1
1
0dB gain
0
0dB differential input gain
(IN3)
1
-6dB differential input
gain (IN3)
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
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