PCM1741

13

SBAS175

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

DACx

DAC Operation Control

where x = 1 or 2, corresponding to the DAC output VOUTL (x = 1) or VOUTR (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, VOUTL and VOUTR. When

DACx = 0, the corresponding output will generate the audio waveform dictated by the data present on the

DATA pin. When DACx = 1, the corresponding output will be set to the bipolar zero level, or VCC/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 Typical Performance

Curves of this data sheet for more information.

DMF[1:0]

Sampling Frequency Selection for the De-Emphasis Function

Default Value: 00

DMF[1:0]

De-Emphasis Same Rate Selection

00

44.1kHz (default)

01

48kHz

10

32kHz

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.

B15

B14

B13

B12

B11

B10

B9

B8

B7

B6

B5

B4

B3

B2

B1

B0

REGISTER 20

0

IDX6

IDX5

IDX4

IDX3

IDX2

IDX1

IDX0

RSV

RSV

FLT

RSV

RSV

FMT2

FMT1

FMT0

FMT[2:0]

Audio Interface Data Format

Default Value: 101

The FMT[2:0] bits are used to select the data format for the serial audio interface. The following table shows

the available format options.

FMT[2:0]

Audio Data Format Selection

000

24-Bit Standard Format, Right-Justified Data

001

20-Bit Standard Format, Right-Justified Data

010

18-Bit Standard Format, Right-Justified Data

011

16-Bit Standard Format, Right-Justified Data

100

I2S Format, 16- to 24-bits

101

Left-Justified Format, 16- to 24-Bits (default)

110

Reserved

111

Reserved