View cs8403a-cs datasheet:

CS8403A-CS IL08 96kHz DIGITAL AUDIO TRANSMITTER —TOP VIEW— INPUTS A0 - A4 : ADDRESS D4 1 24 D3 : CHIP SELECT CS FSYNC : FRAME SYNC D5 2 23 D2 MCK : MASTER CLOCK RD/ : READ/ WR WRITE D6 3 22 D1 SCK : SERIAL CLOCK SDATA : SERIAL DATA D7 4 21 D0 OUTPUTS MCK 5 20 TXP : INTERRUPT INT TXN, TXP : DIFFERENTIAL LINE DRIVERS SCK 6 19 VCC INPUTS/OUTPUTS FSYNC 7 18 GND D0 - D7 : DATA SDATA 8 17 TXN A4 9 16 RD/ WR A3 10 15 INT A2 11 14 CS A1 12 13 A0 8 SDATA SERIAL AUDIO 6 SCK PORT 7 LOGIC FSYNC AUX 1 - 4, 21 - 24 D0 - D7 9 - 13 A0 - A4 C BITS BI-PHASE 20 TXP 14 LINE CONTROL CS MARK 17 DRIVER TXN 16 AND ENCODER RD/ WR FLAGS CRC (4 x 8) MUX INTERRUPT 15 U BITS INT TIMING CONTROL BUFFER IMC