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 |
Revision 1.0 | Page 3 of 25 |
