Cirrus-logic CS4385 Manuel d'utilisateur télécharger pdf (Page 23)

DS671F2 23

CS4385

4.3 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 9-19.

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 LSB

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

LRCK

SCLK

Left Channel

Right Channel

SDINx

6543210987

15 14 13 12 11 10

6543210987

15 14 13 12 11 10

32 clocks

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

LRCK

SCLK

Left Channel

SDINx

65432107

23 22 21 20 19 18

65432107

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

6543210987

15 14 13 12 11 10

6543210987

15 14 13 12 11 10

17 16 17 16

32 clocks

19 18 19 18

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

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 54 55

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Cirrus-logic CS4385 Manuel d'utilisateur Page 23

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