TDA7419 Datasheet, PDF (19/30 Pages) STMicroelectronics – 3 BAND CAR AUDIO PROCESSOR

TDA7419
5.13 Output Selector and Mixing
The output-selector allows the front and rear speakers to connect to different sources. The setup of the
output selector is shown in Figure 24. A Mixing-stage is placed after the front speaker-attenuator and can
be set to mixing-mode. Having a full volume-attenuator for the mix-signal, the stage offers a wide flexibility
to adapt the mixing levels.
Figure 24. Output Selector
Mix_in
Attenuator
Main
Second
BassL+BassR
Attenuator
Attenuator
Subwoofer
filter
Attenuator
Front
Rear
Subwoofer
output
5.14 Audioprocessor Testing
In the test mode, which can be activated by setting bit D7 of the IIC subaddress byte and bit D0 of the
testing audioprocessor byte, several internal signals are available at the SE1R pin. In this mode, the input
resistance of 100kOhm is disconnected from the pin. Internal signals available for testing are listed in the
data-byte specification.
5.15 Test Circuit
Figure 25. Test Circuit
19/30