This is the documentation for the latest (main) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

nRF5340 Audio DK

Overview

The nRF5340 Audio DK (PCA10121) is designed for showcasing, developing and experimenting with Bluetooth® LE Audio.

You can use this board for developing LE-Audio-compatible applications that support Auracast™, connected isochronous streams (CIS) and broadcast isochronous streams (BIS), and offer support for acting as a audio source, audio sink and source + sink.

Zephyr uses the nrf5340_audio_dk_nrf5340 board configuration for building for the nRF5340 Audio DK.

Hardware

The nRF5340 Audio DK comes with the following hardware features:

  • nRF5340 dual-core SoC based on the Arm® Cortex®-M33 architecture

  • CS47L63 Low-Power Audio DSP with mono differential headphone driver

  • nPM1100 Ultra-small form-factor Power Management IC

  • On-board digital microphone

  • On-board power measurement

  • SD card slot

  • Built-in debugger

  • Stereo analog input using 3.5 mm jack

  • USB soundcard capability

nRF5340 DK

More information about the board can be found at the nRF5340 Audio DK website 1. The Nordic Semiconductor Infocenter 2 contains the processor’s information and the datasheet.

nRF5340 SoC

The nRF5340 Audio DK is built around the nRF5340 SoC, which has the following characteristics:

  • A full-featured Arm Cortex-M33F core with DSP instructions, FPU, and Armv8-M Security Extension, running at up to 128 MHz, referred to as the application core.

  • A secondary Arm Cortex-M33 core, with a reduced feature set, running at a fixed 64 MHz, referred to as the network core.

The nrf5340_audio_dk_nrf5340_cpuapp build target provides support for the application core on the nRF5340 SoC. The nrf5340_audio_dk_nrf5340_cpunet build target provides support for the network core on the nRF5340 SoC.

The Nordic Semiconductor Infocenter 2 contains the processor’s information and the datasheet.

Supported Features

See nRF5340 DK and Nordic Semiconductor Infocenter 2 for a complete list of nRF5340 Audio DK board hardware features.

Programming and Debugging

Flashing

Follow the instructions in the Nordic nRF5x Segger J-Link page to install and configure all the necessary software. Further information can be found in Flashing. Then you can build and flash applications as usual (Building an Application and Run an Application for more details).

Warning

The nRF5340 has a flash read-back protection feature. When flash read-back protection is active, you will need to recover the chip before reflashing. If you are flashing with west, run this command for more details on the related --recover option:

west flash -H -r nrfjprog --skip-rebuild

Note

Flashing and debugging applications on the nRF5340 Audio DK requires upgrading the nRF Command Line Tools to version 10.12.0. Further information on how to install the nRF Command Line Tools can be found in Flashing.

Debugging

Refer to the Nordic nRF5x Segger J-Link page to learn about debugging Nordic boards with a Segger IC.

References

1

https://www.nordicsemi.com/Products/Development-hardware/nrf5340-audio-dk

2(1,2,3)

https://infocenter.nordicsemi.com