Headset Reference Design v1.0
2 System Description
The headset unit can be used to communicate with either a USB dongle or an audio dongle.
Note: The audio dongle is simply a headset unit with different firmware and jumper settings.
Figure 1. ”Headset unit with a USB configuration” and Figure 2. ”System diagram of headset unit with USB configuration” illustrate the headset unit with a USB configuration.
Headset
unit
USB
dongle
Figure 1. Headset unit with a USB configuration
Audio DAC
Out
Audio ADC
In
Application
Voice
Protocol
MCU
I/O
Buttons 
LED
ShockBurst
I/O 
PHY RF
ShockBurst
PHY 
I/O RF
Application
Voice
Protocol
MCU
I/O
LED
USB
Audio Controller
I/O USB USB
In/Out
Figure 2. System diagram of headset unit with USB configuration
Figure 3. ”Headset unit with an audio dongle configuration” and Figure 4. ”System diagram of headset unit with audio dongle configuration” illustrate the headset unit with audio dongle configuration.
Headset
unit
Audio dongle
Figure 3. Headset unit with an audio dongle configuration
Revision 1.0 | Page 5 of 25 |