Nordic Star Products NRD24V1 Manuale Utente
Revision 1.0
Page 3 of 25
Headset Reference Design v1.0
Contents
1
Introduction ................................................................................................. 4
2
System Description ..................................................................................... 5
3
Hardware description .................................................................................. 7
3.1
nRD24V1 Radio module ...................................................................... 7
3.1.1
Audio Codec..................................................................................... 7
3.1.2
Micro controller................................................................................. 8
3.1.3
Radio circuit ..................................................................................... 8
3.1.4
Antenna matching network............................................................... 8
3.1.5
Power supply.................................................................................... 8
3.1.6
Programming.................................................................................... 8
3.1.7
Specifications ................................................................................... 9
3.2
Application board ................................................................................. 10
3.2.1
Audio interface ................................................................................. 10
3.2.2
Jumpers ........................................................................................... 12
3.2.3
Antenna............................................................................................ 12
3.2.4
Power supply.................................................................................... 12
3.2.5
Buttons ............................................................................................. 13
3.2.6
Programming.................................................................................... 13
3.3
USB dongle .......................................................................................... 14
3.3.1
USB Interface................................................................................... 15
3.3.2
Micro controller................................................................................. 15
3.3.3
Radio circuit ..................................................................................... 15
3.3.4
Power supply.................................................................................... 15
3.3.5
Programming.................................................................................... 15
3.3.6
Specifications ................................................................................... 16
4
Hardware design guidelines ........................................................................ 17
4.1
Headset ................................................................................................ 17
4.1.1
Antenna............................................................................................ 17
4.1.2
Interfaces ......................................................................................... 17
4.1.3
Crystals ............................................................................................ 18
4.1.4
MCU ................................................................................................. 18
4.1.5
Battery.............................................................................................. 18
4.2
USB dongle .......................................................................................... 19
4.2.1
Antenna............................................................................................ 19
4.2.2
MCU ................................................................................................. 19
4.2.3
Crystals ............................................................................................ 19
5
Appendix ..................................................................................................... 20
5.1
Bill Of Materials (BOM) ........................................................................ 20
5.2
Application board schematics .............................................................. 23
5.3
RF module schematics......................................................................... 24
5.4
USB dongle schematics ....................................................................... 25