CS42428 datasheet(27/73 Pages) CIRRUS

27 / 73 page

DS605F1

CS42428

4.5.2

Serial Audio Interface Formats

The DAC_SP and ADC_SP digital audio serial ports support five formats with varying bit depths from 16

to 24 as shown in Figures 11 to 15. These formats are selected using the configuration bits in the registers,

“Functional Mode (address 03h)” on page 43 and “Interface Formats (address 04h)” on page 45. For the

diagrams below, Single-Speed Mode is equivalent to Fs = 32, 44.1, 48 kHz; Double-Speed Mode is for

Fs = 64, 88.2, 96 kHz; and Quad-Speed Mode is for Fs = 176.4, 196 kHz.

Left C hann el

R ig h t C han nel

654

987

15 1 4 13 12 11 10

432

15 14 13 12 11 10

DAC_SDIN x

ADC_SDOUT

DAC_LRCK

AD C_LRCK

DAC_SCLK

ADC_SCLK

Figure 11. Right-Justified Serial Audio Formats

Right-Justified Mode, Data Valid on Rising Edge of SCLK

Bits/Sample

SCLK Rate(s)

Notes

Master

Slave

64 Fs

48, 64, 128 Fs

Single-Speed Mode

64 Fs

Double-Speed Mode

64 Fs

Quad-Speed Mode

64, 128, 256 Fs

64, 128 Fs

Single-Speed Mode

64 Fs

Double-Speed Mode

64 Fs

Quad-Speed Mode

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