STV8207 datasheet(39/149 Pages) STMICROELECTRONICS

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STV82x7

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 23: SCART Input Matrix

Figure 24: SCART1/2/3 Output Matrix

S1in

S2in

S3in

MONO_in

Audio ADC

Select

Digital

Matrix

S4in

S1in

S2in

S3in

Stereo DAC

S1out

Select or Mute

S4in

MONO_in

Soft

mute

STV8207 数据表(PDF) 39 Page - STMicroelectronics

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