Nordic Semiconductor nRF5340 Audio Development Kit

Nordic Semiconductor nRF5340 Audio Development Kit is a platform designed for BLUETOOTH® "LE Audio," including everything needed to start development. The configurable nRF5340 Audio Kit functions as a USB dongle allowing audio data to be sent or received from a PC, or it can serve as a business headset, a broadcast receiver, or a True Wireless Stereo (TWS) earbud. Two or more kits are recommended for most use cases.

The Nordic nRF5340 Audio Development Kit contains three primary devices - an nRF5340 SoC, an nPM1100 PMIC, and Cirrus Logic’s CS47L63 Audio DSP. The CS47L63 high-performance DAC and differential output driver are intended for direct connection to an external headphone load. The CS47L63 is ideal for earbuds with mono-only and direct speaker output. The nRF5340 Audio DK is typically powered via USB and has a battery connector for a Li-Ion/Li-Po battery. The Power Profiler Kit II uses the dedicated current measurement pins to allow current consumption measurement.

The “Low Complexity Communications Codec” (LC3) that replaced Bluetooth Classic’s “Low Complexity Subband Codec” (SBC) is available on the nRF5340 audio development kit. The LC3 codec has superior audio quality than SBC, even at about half the wireless data rate. The low data rate is a critical factor in minimizing power consumption.


  • nRF5340 SoC
    • High-performance application processor
      • 128MHz/64MHz Arm® Cortex-M33 with FPU and DSP instructions
      • 1MB Flash + 512KB RAM
    • Fully programmable, ultra-low-power network processor
      • 64MHz Arm Cortex®-M33 with 2KB instruction cache
      • 256KB Flash and 64KB RAM
    • Arm® TrustZone® and Arm CryptoCell-312
    • Trusted execution, root-of-trust, secure key storage
    • Bluetooth Low Energy
      • LE Audio
      • 2Mbps, Advertising extensions, and long-range
    • NFC
    • Full range of digital interfaces with EasyDMA
      • 96MHz encrypted QSPI for external memory
      • 32MHz high-speed SPI for displays and fast sensors
      • 12Mbps full-speed USB, I²S, PDM, 4x PWM, 2x QDEC
    • 12-bit 200ksps ADC
    • 105°C extended operating temperature
    • 1.7V to 5.5V supply voltage range NFC
  • nRF5340 Audio DK
    • Bluetooth LE Audio support
    • Based on our nRF5340 SoC
    • 2.4GHz antenna
    • Two 3.5mm audio jacks
    • Cirrus Logic Audio DSP CS47L63
    • SWF RF connector for direct RF measurements
    • 5 user-programmable buttons
    • 4 user-programmable LEDs
    • SEGGER J-Link debugger onboard
    • Pins for measuring power consumption
    • SD-Card holder for additional storage


  • LE Audio
  • Headphones
  • Hearing aids
  • Audio guides
  • Office headsets
  • Audio broadcast solutions
  • Conference speakerphones

Kit Contents

  • Two 3.5mm audio jacks for analog in and headphones out
  • Five user-programmable buttons and LEDs
  • SD-Card holder for extra storage if needed
  • SEGGER J-Link debugger for programming and debugging
  • Connectors to access the analog/digital interfaces, and GPIOs

Block Diagram

Block Diagram - Nordic Semiconductor nRF5340 Audio Development Kit


Nordic Semiconductor nRF5340 Audio Development Kit
Published: 2022-05-02 | Updated: 2023-08-29