CS4364 datasheet(22/50 Pages) CIRRUS

22 / 50 page

DS619A1

CS4364

3.3

Digital Interface Formats

The serial port operates as a slave and supports the I²S, Left-Justified, Right-Justified, One-Line Mode

(OLM) and TDM digital interface formats with varying bit depths from 16 to 32 as shown in Figures 9-17.

Data is clocked into the DAC on the rising edge. OLM and TDM configurations are only supported in soft-

ware mode.

LRCK

SCLK

Left Channel

Right Channel

SDINx

+3 +2 +1

+5 +4

-1 -2 -3 -4 -5

+3 +2 +1

+5 +4

-1 -2 -3 -4

MSB

LSB

MSB

LSB

Figure 9. Format 0 - Left-Justified up to 24-bit Data

LRCK

SCLK

Left Channel

Right Channel

SDINx

+3 +2 +1

+5 +4

-1 -2 -3 -4 -5

+3 +2 +1

+5 +4

-1 -2 -3 -4

MSB

LSB

Figure 10. Format 1 - I²S up to 24-bit Data

LRCK

SCLK

Left Channel

Right Channel

SDINx

65 432 1 0

98 7

15 14 13 12 11 10

6 543 2 1 0

98 7

15 14 13 12 11 10

32 clocks

Figure 11. Format 2 - Right-Justified 16-bit Data

LRCK

SCLK

Left Channel

SDINx

65 432 1 0

23 22 21 20 19 18

6 543 2 1 0

23 22 21 20 19 18

32 clocks

Right Channel

Figure 12. Format 3 - Right-Justified 24-bit Data

LRCK

SCLK

Left Channel

Right Channel

SDINx

654 3210

987

15 14 13 12 11 10

654321 0

987

15 14 13 12 11 10

17 16

32 clocks

19 18

Figure 13. Format 4 - Right-Justified 20-bit Data

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