GS3471 datasheet(78/179 Pages) SEMTECH

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GS3471

Final Data Sheet Rev.4

PDS-060498

September 2017

78 of 179

Semtech

www.semtech.com

4.21.2 Serial Audio Data Format Support

The GS3471 supports the following serial audio data formats:

•I2S (default)

•AES/EBU

•

Serial Audio Left Justified, MSB First

•

Serial Audio Right Justified, MSB First (supported for HD and 3G only)

By default (at power up or after system reset) I2S is selected. The other data formats are

selectable via the host interface using the AMA/AMB[1:0] bits of the CFG_AUD(HD/3G)

or CFG_OUTPUT(SD) register.

When I2S format is desired, both groups must be set to I2S (i.e. AMA = AMB = 11). This is

because they share the same WCLK.

Figure 4-42: I2S Audio Output Format

Figure 4-43: AES/EBU Audio Output Format

Figure 4-44: Serial Audio, Left Justified, MSB First

Table 4-17: Audio Output Formats

AMA/AMB[1:0]

Audio Output Format

AES/EBU audio output

Serial audio output: Left Justified; MSB first

Serial audio output: Right Justified; MSB first (supported for

HD and 3G only)

I2S (Default)

WCLK

ACLK

AOUT_[8_7:2_1]

MSB

LSB

MSB

LSB

Channel A (Left)

Channel B (Right)

WCLK

ACLK

AOUT_[8_7:2_1]

LSB

MSB

Channel A (Left)

Channel B (Right)

123

AUX

Preamble

LSB

MSB

AUX

Preamble

WCLK

ACLK

AOUT_[8_7:2_1]

MSB

LSB

MSB

LSB

Channel A (Left)

Channel B (Right)

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