Datasheet

PCM1690
SBAS448A – OCTOBER 2008 – REVISED JANUARY 2009 .............................................................................................................................................. www.ti.com
DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
70 46 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
0 Fine step: 0.5-dB step for 0 dB to – 63 dB range (default)
1 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 or enable the various sampling frequencies of the digital
de-emphasis function.
Default value: 00.
DEMP Digital de-emphasis function/sampling rate control
00 Disable (default)
01 48 kHz enable
10 44.1 kHz enable
11 32 kHz enable
AZRO[1:0] Zero flag channel combination selection
The AZRO[1:0] 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, analog mute works even if the data of DATA2 – 4 are not zero.
Default value: 00
B
.
AZRO Zero flag combination selection
00 Combination A: ZERO1 = DATA1 left channel, ZERO2 = DATA1 right channel
(default)
01 Combination B: ZERO1 = DATA1 – 4, ZERO2 = DATA1 – 4
10 Combination C: ZERO1 = DATA4, ZERO2 = DATA1 – 3
11 Combination D: ZERO1 = DATA1, ZERO2 = DATA2 – 4
ZREV Zero flag polarity selection
This bit controls the polarity of the zero flag pin.
Default value: 0.
ZREV Zero flag polarity selection
0 High for zero detect (default)
1 Low for zero detect
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