User Manual

DS605F2 27
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 Channel
Right Channel
6543210987
15 14 13 12 11 10
6543210987
15 14 13 12 11 10
DAC_SDINx
ADC_SDOUT
DAC_LRCK
ADC_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
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