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CS4392
(Rev.:2002)

24-Bit, 192 kHz Stereo DAC with Volume Control

Cirrus Logic 

CS4392

3.6 Digital Interface Format

The device will accept audio samples in several digital interface formats as illustrated in Tables 5 and 8.

The desired format is selected via the M0 and M1 pins for stand alone mode, and through the DIF2:0 bits

in the control port. For an illustration of the required relationship between the Left/Right Clock, Serial

Clock and Serial Audio Data, see Figures 4-6.

M1

M0

DESCRIPTION

0

0

Left Justified, up to 24-bit data

0

1

I2S, up to 24-bit data

1

0

Right Justified, 16-bit Data

1

1

Right Justified, 24-bit Data

FORMAT

0

1

2

3

FIGURE

4

5

6

6

Table 5. Digital Interface Format, Stand-Alone Mode Options

LRCK

SCLK

SDATA

Left Channel

Right Channel

M SB -1 -2 -3 -4 -5 +5 +4 +3 +2 +1 LS B

M SB -1 -2 -3 -4 +5 +4 +3 +2 +1 LSB

Figure 4. Format 0, Left Justified up to 24-Bit Data

LRCK

SCLK

SDATA

Left Channel

Right C hannel

MS B -1 -2 -3 -4 -5 +5 +4 +3 +2 +1 LSB

MS B -1 -2 -3 -4 +5 +4 +3 +2 +1 L SB

Figure 5. Format 1, I2S up to 24-Bit Data

LRCK

SCLK

SD ATA LSB

Left Channel

Right Channel

MSB -1 -2 -3 -4 -5 -6

+6 +5 +4 +3 +2 +1 LSB

MSB -1 -2 -3 -4 -5 -6

+6 +5 +4 +3 +2 +1 LSB

32 clocks

Figure 6. Format 2, Right Justified 16-Bit Data

Format 3, Right Justified 24-Bit Data

Format 4, Right Justified 20-Bit Data. (Available in Control Port Mode only)

Format 5, Right Justified 18-Bit Data. (Available in Control Port Mode only)

DS459PP2

11

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