CODEC Motherboard Manual Version 1.3 Page 5 of 66 April 12, 2016CODEC Motherboard8.4. Digital Audio Using the NAU8822 .................................................................. 478.4.1. NAU8822 Master Clock Requirement..................................................... 478.4.2. Master Clock Selection........................................................................... 478.4.3. Frame Sync (Sample Rate Clock) .......................................................... 478.4.4. Bit Clock (BLCK) .................................................................................... 478.5. Digital Audio Input .......................................................................................... 488.5.1. Formatted Digital Audio .......................................................................... 498.5.2. USB Audio ............................................................................................. 498.5.3. Unformatted Audio ................................................................................. 498.6. Digital Audio Output ....................................................................................... 508.6.1. Formatted Digital Audio .......................................................................... 508.6.2. USB Audio ............................................................................................. 508.6.3. Unformatted Audio ................................................................................. 508.7. Digital Audio Related Connector Options ....................................................... 518.8. USB and External Control CONNECTIONS ................................................... 528.8.1. Special Connectors ................................................................................ 528.9. Jumpers ......................................................................................................... 538.10. Table of Jumper Options ................................................................................ 548.11. Test Points..................................................................................................... 558.12. Table of Test Points ....................................................................................... 569. NAU8822-EVB Schematics (High Resolution Images)........................................... 5710. LIST OF FIGURES ............................................................................................ 6511. LIST OF TABLES .............................................................................................. 6512. VERSION HISTORY.......................................................................................... 65