Nordic nRF5340 オーディオ開発キット

Nordic has recently launched a new Bluetooth audio portfolio product, the Nordic nRF5340 Audio Development Kit. This audio DK includes everything needed to help developers take advantage of the high sound quality, low power consumption and wireless stereo enhancements of Bluetooth LE Audio.

Nordic announces the nRF5340 Audio Development Kit, a design platform for rapid development of Bluetooth® LE Audio products. nRF5340 は、2 つの Arm® Cortex®-M33 プロセッサを搭載した世界初のワイヤレス SoC です。, LE Audio やその他の複雑なモノのインターネットに最適 (IoT) アプリケーション.

Bluetooth 特別関心事グループ (言う) describes LE Audio as “the future of wireless sound”. This technology is based on the low-complexity communication codec LC3, an enhancement to the low-complexity subband codec (SBC) used by Classic Audio.

LC3 ensures that LE Audio has higher audio quality and longer battery life than Classic Audio in all use cases. Extensive listening testing has shown that the LC3 provides better audio quality than SBC at the same sample rate at all sample rates, and delivers equal or better audio quality at half the wireless data rate.

Lower data rates are a key factor in minimizing power consumption in LE Audio products. LE Audio also brings True Wireless Stereo (TWS) and other new features to wireless audio applications, including Audio Sharing.。

The Audio DK’s core nRF5340 SoC combines a high-performance application processor with a fully programmable ultra-low-power network processor for optimal power efficiency and high performance in a dual-core architecture. の 128 MHz Arm Cortex-M33 applications processor contains 1 MB of flash and 512 KB of RAM, making it ideal for handling custom applications and audio codecs such as LC3.

の 64 MHz Arm Cortex-M33 network processor has 256 KB of flash memory and 64 KB of RAM, and is power-optimized to run Nordic Bluetooth LE Audio RF protocol software. The nRF Connect SDK is an nRF5340 SoC development platform that provides nRF5340 Audio DK board level support and supports LE Audio, Bluetooth低エネルギー, Thread and other applications.

nRF5340 SoC に加えて, the Audio DK features Nordic’s nPM1100 power management IC (PMIC) and Cirrus Logic’s CS47L63 audio digital signal processor (DSP).

The nPM1100 features a highly efficient configurable buck regulator and an integrated battery charger with up to 400mA charging current in a very small form factor, TWS イヤホンなどのスペースに制約のあるアプリケーションにとって理想的な PMIC となります。. CS47L63 は、モノラルおよび直接スピーカー出力のみを備えたイヤホン製品の外部ヘッドフォン負荷への直接接続用に最適化された高性能 DAC および差動出力ドライバーを備えています。.