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AN555 View Datasheet(PDF) - Silicon Laboratories

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AN555 Datasheet PDF : 38 Pages
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15
Rev. 0.2
Figure 9. Si483x-B Applications Circuits with 32-Level Volume Control
AN555
3.4. Si48x-B/Si4820/24 Application Circuits with 32-Level Volume Control via 2 Push
Buttons
Figure 9 sets Si483x-B in "Volume" mode by adding the pull-up resistor R42 of 10K at pin 2 STATION. Figure 10
illustrates the application circuit for Si4820/24. Pressing button S3 once decreases the volume level by 2 dB;
pressing button S4 once increases the volume level by 2 dB. A total of 32 steps (2 dB per step) are available for the
push button volume control. If pressing and holding S3 or S4, tuner volume will step through all levels until
reaching the minimum or maximum, respectively.
 

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