Datasheet

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PCM1780 , PCM1781 , PCM1782
SLES132B – MARCH 2005 – REVISED AUGUST 2006
B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
REGISTER 19 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 RSV DMF1 DMF0 DM12 RSV RSV DAC2 DAC1
NOTE: RSV indicates a reserved bit that should be set to 0.
DACx: DAC Operation Control
Where x = 1 or 2, corresponding to the DAC output V
OUT
L (x = 1) or V
OUT
R (x = 2).
Default value: 0
DACx = 0 DAC operation enabled (default)
DACx = 1 DAC operation disabled
The DAC operation controls are used to enable and disable the DAC outputs, V
OUT
L and V
OUT
R. When
DACx = 0, the corresponding output generates the audio waveform dictated by the data present on the DATA
pin. When DACx = 1, the corresponding output is set to the dc common voltage (V
COM
), equal to V
CC
/2.
DM12: Digital De-Emphasis Function Control
Default value: 0
DM12 = 0 De-emphasis disabled (default)
DM12 = 1 De-emphasis enabled
The DM12 bit is used to enable or disable the digital de-emphasis function. Refer to the plots shown in the
Typical Performance Curves section of this data sheet.
DMF[1:0]: Sampling Frequency Selection for the De-Emphasis Function
Default value: 00
DMF[1:0] De-Emphasis Sample Rate Selection
00 44.1 kHz (default)
01 48 kHz
10 32 kHz
11 Reserved
The DMF[1:0] bits are used to select the sampling frequency used for the digital de-emphasis function when it is
enabled.
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