资料介绍
1. INTRODUCTION ...................................................................................................…. 5
1.1 General Information ....................................................................................… 5
2. SYSTEM STARTUP ..............................................................................................…. 6
2.1 General Purpose I/O Pins and I/O Expander Pins ....................................… 8
2.1.1 No Digital I/O Configuration .................................................................… 9
2.1.1.1 Functions within “No Digital I/O Configuration” – mode ……….. 9
2.1.2 Four-pins Digital I/O configurations ......................................................… 13
2.1.2.1 Functions within “Four-pins I/O Configuration” – mode ……….. 13
2.1.3 Six-pins Digital I/O configurations ........................................................… 14
2.1.3.1 Functions within “Six-pins I/O Configuration” – mode ……..…… 15
2.1.4 Diode Selection ...................................................................................…. 16
2.2 Additional External Circuitry .....................................................................…. 18
2.2.1 Oscillator Circuit .................................................................................…. 18
2.2.2 Coils at the input of the USB-bus ......................................................….. 19
2.2.3 Coils at the Vdd lines of the UDA1335H ..........................................…… 19
2.2.4 I/O expander test – board ……………………………..……………………. 19
2.2.5 Bilateral Selector / Switch (HEF4066 or 74LV4066) ..………….………... 20
2.2.6 Single Master Controller board ………………………..……………………. 21
2.3 Currently implemented hardware configurations ……………………………. 22
3. CONFIGURATION DATA STRUCTURE ...................................................…… 23
3.1 Working with Dynamic Bass Boost (DBB) ..........................................…….. 23
3.2 Working with Default Volume .............................................................……… 23
3.3 Working with Clipping Prevention and Distortion Level ..................…….. 23
3.4 Product ID (idProduct) and Vendor ID (idVendor) ............................…..…. 24
3.5 Other possible hardware configurations ............................……..…………. 24
4. CUSTOMIZING YOUR DESIGN .................................................................…. 25
4.1 Handling Device Configurations .......................................................………. 25
4.2 Configuring the USB-APRP ………...........................................................…. 25
4.3 The USB-I²C communication driver .....................................................……. 25
5. USB CONTACT ADDRESS .........................................................................… 26
6. GLOSSARY ...............................................................................................…... 26
7. FREQUENTLY ASKED QUESTIONS ........................................................….. 27
8. REFERENCES .............................................................................................…. 40
1.1 General Information ....................................................................................… 5
2. SYSTEM STARTUP ..............................................................................................…. 6
2.1 General Purpose I/O Pins and I/O Expander Pins ....................................… 8
2.1.1 No Digital I/O Configuration .................................................................… 9
2.1.1.1 Functions within “No Digital I/O Configuration” – mode ……….. 9
2.1.2 Four-pins Digital I/O configurations ......................................................… 13
2.1.2.1 Functions within “Four-pins I/O Configuration” – mode ……….. 13
2.1.3 Six-pins Digital I/O configurations ........................................................… 14
2.1.3.1 Functions within “Six-pins I/O Configuration” – mode ……..…… 15
2.1.4 Diode Selection ...................................................................................…. 16
2.2 Additional External Circuitry .....................................................................…. 18
2.2.1 Oscillator Circuit .................................................................................…. 18
2.2.2 Coils at the input of the USB-bus ......................................................….. 19
2.2.3 Coils at the Vdd lines of the UDA1335H ..........................................…… 19
2.2.4 I/O expander test – board ……………………………..……………………. 19
2.2.5 Bilateral Selector / Switch (HEF4066 or 74LV4066) ..………….………... 20
2.2.6 Single Master Controller board ………………………..……………………. 21
2.3 Currently implemented hardware configurations ……………………………. 22
3. CONFIGURATION DATA STRUCTURE ...................................................…… 23
3.1 Working with Dynamic Bass Boost (DBB) ..........................................…….. 23
3.2 Working with Default Volume .............................................................……… 23
3.3 Working with Clipping Prevention and Distortion Level ..................…….. 23
3.4 Product ID (idProduct) and Vendor ID (idVendor) ............................…..…. 24
3.5 Other possible hardware configurations ............................……..…………. 24
4. CUSTOMIZING YOUR DESIGN .................................................................…. 25
4.1 Handling Device Configurations .......................................................………. 25
4.2 Configuring the USB-APRP ………...........................................................…. 25
4.3 The USB-I²C communication driver .....................................................……. 25
5. USB CONTACT ADDRESS .........................................................................… 26
6. GLOSSARY ...............................................................................................…... 26
7. FREQUENTLY ASKED QUESTIONS ........................................................….. 27
8. REFERENCES .............................................................................................…. 40
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