CS42426 Datasheet, PDF (18/67 Pages) Cirrus Logic – 114 dB, 192kHz 6-Ch CODEC WITH PLL

CS42426
3.5.2 Serial Audio Interface Formats
The DAC_SP and ADC_SP digital audio serial ports support 5 formats with varying bit depths from 16 to
24 as shown in Figure 7, Figure 8, Figure 9, Figure 10 and Figure 11. These formats are selected using the
configuration bits in the registers, “Functional Mode (address 03h)” on page 33 and “Interface Formats
(address 04h)” on page 34. For the diagrams below, single-speed mode is equivalent to Fs = 32, 44.1,
48kHz; double-speed mode is for Fs = 64, 88.2, 96 kHz; and quad-speed mode is for Fs = 176.4, 196 kHz.
DAC_LRCK
ADC_LRCK
DAC_SCLK
ADC_SCLK
D A C_ S DIN x
ADC_SDOUT
Left Channel
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Right Chan nel
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Right Justified Mode, Data Valid on Rising Edge of SCLK
Bits/Sample
SCLK Rate(s)
Notes
Master
Slave
16
64 Fs
48, 64, 128 Fs
single-speed mode
64 Fs
64 Fs
double-speed mode
64 Fs
64 Fs
quad-speed mode
24
64, 128, 256 Fs
64, 128 Fs
single-speed mode
64 Fs
64 Fs
double-speed mode
64 Fs
64 Fs
quad-speed mode
Figure 7. Right Justified Serial Audio Formats
18