Nordic Star Products NRD24V1 - Manual (Page 5)

Revision 1.0 Page 5 of 25
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.
Figure 1. Headset unit with a USB configuration
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.
Figure 3. Headset unit with an audio dongle configuration
USB
dongle
Headset
unit
DAC
ADC
MCU
Voice
Protocol
I/O
I/O
PHY
RF
ShockBurst
Buttons LED
Application
Audio
Out
Audio
In
Application
MCU
Voice
Protocol
I/O
I/O
PHY
RF
ShockBurst
LED
I/O
USB
Audio Controller
USB
USB
In/Out
Audio
dongle
Headset
unit