TDA7405 datasheet(22/56 Pages) STMICROELECTRONICS

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TDA7405

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2.10.6Output Selector

The output-selector allows to connect the main- or the second-source to the Front-, Rear-speaker-attenuator,

respectively. As an example of this programming the device is able to connect via software the main-source to

the back (rear) and the second-source to the front (see Figure 19).

Figure 19. Output Selector

2.10.7Speaker-Attenuator and Mixing

A Mixing-stage is placed after each speaker-attenuator and can be set independently to mixing-mode. Having

a full volume for the Mix-signal the stage offers a wide flexibility to adapt the mixing levels.

Figure 20. Mixing Configuration

2.10.8Audioprocessor Testing

During the Testmode, which can be activated by setting bit D0 of the stereodecoder testing-byte and the audio-

processor testing byte, several internal signals are available at the FD2R- pin. During this mode the input re-

sistance of 100kOhm is disconnected from the pin. The internal signals available are shown in the Data-byte

specification.

TDA7405 数据表(PDF) 22 Page - STMicroelectronics