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STV8217 Datasheet(PDF) 41 Page - STMicroelectronics

Part # STV8217
Description  Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders
PDF  156 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STV8217 Datasheet(HTML) 41 Page - STMicroelectronics

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STV82x7
Analog Audio Matrix (In / Out)
5
Analog Audio Matrix (In / Out)
The analog part of the audio matrix can be divided into two parts: the SCART input matrix and the
SCART output matrix.
The SCART input matrix is an input for the digital matrix (after the ADC) which select which source
will be sent to the DSP.
The SCART output matrix selects the sound to output, which can be directly a SCART input or the
output of the DSP. A mute function is provided to switch off the outputs.
A soft-mute function is provided to avoid all spurious sounds when switching from one position to
another position.
The SCART 2 and 3 output matrices have the same functions as the SCART 1 output matrix.
The particularity of the matrix is to accept input signal of 2 VRMS and to have the capability to output
such level. In this case, the power supply must be 8 V.
The Mono audio input is able to accept signals with a 0.5 VRMS amplitude.
Figure 24: SCART Input Matrix
Figure 25: SCART1/2/3 Output Matrix
S1in
S2in
S3in
MONO_in
2
Audio ADC
Select
Digital
Matrix
S4in
S1in
S2in
S3in
Stereo DAC
2
S1out
Select or Mute
S4in
MONO_in
Soft
mute



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