PCM1691 datasheet(34/47 Pages) TI

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PCM1691

SBAS450 – OCTOBER 2008.............................................................................................................................................................................................. www.ti.com

DEC

HEX

DAMS

RSV

DEMP1

DEMP0

RSV

AZRO1

AZRO0

ZREV

DAMS

Digital attenuation mode

This bit selects the attenuation mode.

Default value: 0.

DAMS

Digital attenuation mode

Fine step: 0.5-dB step for 0 dB to –63 dB range (default)

Wide range: 1-dB step for 0 dB to –100 dB range

RSV

Reserved

Reserved; do not use.

DEMP[1:0]

Digital de-emphasis function/sampling rate control

These bits are used to disable and enable the various sampling frequencies of the digital

de-emphasis function.

Default value: 00.

DEMP

Digital de-emphasis function/sampling rate control

Disable (default)

48 kHz enable

44.1 kHz enable

32 kHz enable

AZRO[1:0]

Zero flag channel combination selection

These bits are used to select the zero flag channel combination for ZERO1 and ZERO2.

If the analog mute function control by ZERO flags is used, AZRO[1:0] should not be set '00';

otherwise, the analog mute works even if the data of DIN2-4 are not zero.

Default value: 00.

AZRO

Zero flag combination selection

Combination A: ZERO1 = DIN1 left channel, ZERO2 = DIN1 right channel (default)

Combination B: ZERO1 = DIN1-4, ZERO2 = DIN1-4

Combination C: ZERO1 = DIN4, ZERO2 = DIN1-3

Combination D: ZERO1 = DIN1, ZERO2 = DIN2-4

ZREV

Zero flag polarity selection

This bit controls the polarity of the zero flag pin.

Default value: 0.

ZREV

Zero flag polarity selection

High for zero detect (default)

Low for zero detect

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