cs5364 Cirrus Logic, Inc., cs5364 Datasheet - Page 22

• Manufacturer Part Number: cs5364
• Description: 114 Db, 192 Khz, 4-channel A/d Converter
• Manufacturer: Cirrus Logic, Inc.

22
4.5
4.5.1 I²S and LJ Format
SCLK
LRCK
SDOUT
SCLK
LRCK
SDOUT
Serial Audio Interface (SAI) Format
The SAI port consists of two timing pins (SCLK, LRCK/FS) and four audio data output pins (SDOUT1/TDM,
SDOUT2, SDOUT3/TDM and SDOUT4). The CS5364 output is serial data in I²S, Left-Justified (LJ), or Time
Division Multiplexed (TDM) digital audio interface formats. These formats are available to the user in both
Stand-Alone Mode and Control Port Mode.
The I²S and LJ formats are both two-channel protocols. During one LRCK period, two channels of data are
transmitted, odd channels first, then even. The MSB is always clocked out first.
In Slave Mode, the number of SCLK cycles per channel is fixed as described under
- I²S/LJ Timing” on page
master controller, the CS5364 will fill the longer frame with trailing zeros. If fewer than 24 SCLK cycles per
channel are received from a master, the CS5364 will truncate the serial data output to the number of SCLK
cycles received. For a complete overview of serial audio interface formats, please refer to Cirrus Logic Ap-
plication Note AN282.
MSB
MSB
receiver latches data on rising edges of SCLK
receiver latches data on rising edges of SCLK
Odd Channels 1,3, ...
Odd Channels 1,3, ...
...
15. In Slave Mode, if more than 32 SCLK cycles per channel are received from a
...
LSB
LSB
Figure 10. I²S Format
Figure 11. LJ Format
MSB
MSB
Even Channels 2,4, ...
Even Channels 2,4, ...
...
...
LSB
LSB
“Serial Audio Interface
CS5364
DS625F3
MSB
MSB