1. INTRODUCTION .......................................................................................................... 5
1.1 General Information ....................................................................................….. 5
2. SYSTEM STARTUP ..............................................................................................….... 6
2.1 General Purpose Input / Output Pins (GPIO’s) .........................................…...... 8
2.1.1 No Digital I/O Configuration ................................................................….. 9
2.1.1.1 Connect / Disconnect (GP5) .................................................... 9
2.1.1.2 Possibilities with function 1 and function 2 ............................... 10
2.1.2 Four-pins Digital I/O configurations ......................................................…. 13
2.1.2.1 Possibilities with function 1 and function 2 ............................... 13
2.1.3 Six-pins Digital I/O configurations ............................................................. 14
2.1.4 Diode Selection ........................................................................................ 15
2.2 Additional External Circuitry .....................................................................…...... 17
2.2.1 Oscillator Circuit ........................…......................................................... 17
2.2.2 Coils at the input of the USB …….......................................................... 18
2.2.3 Coils at the Vdd lines of the UDA1321 ...........................................….... 18
2.2.4 USB-DAC sub-control PCB …............................................................... 18
3. CONFIGURATION DATA STRUCTURE ...........................................................…......... 22
3.1 Working with Dynamic Bass Boost (DBB) .......................................................... 22
3.2 Working with Default Volume ............................................................................. 22
3.3 Product ID (idProduct) and Vendor ID (idVendor) ............................................... 22
4. CUSTOMIZING YOUR DESIGN .................................................................................... 23
4.1 Handling Device Configurations ......................................................................... 23
4.2 USB-DAC configuration Editor ........................................................................... 23
4.3 The USB-I2C example driver ............................................................................... 23
5. USB CONTACT ADDRESS ........................................................................................... 24
6. GLOSSARY ................................................................................................................... 24
7. FREQUENTLY ASKED QUESTIONS ........................................................................... 25
8. REFERENCES .............................................................................................................. 29