Microchip Technology BM20SPKS1NBC-0001AA Bluetooth 5.0 Audio Module

This module requires an external analog Codec, DSP, or amplifier, as well as a host microcontroller (MCU) to process and output audio. The module itself handles the Bluetooth stack, audio decoding (SBC/AAC), and processing (AEC/Noise Reduction), but it provides only stereo analog output signals that must be fed into your external audio chain. You must design this external circuitry according to your application's audio quality and power requirements.

You configure the module via its UART interface using a set of proprietary AT commands. You can send these commands directly from your host MCU connected to the module's UART pins. Alternatively, Microchip Technology provides a Windows-based GUI configuration tool for initial setup and testing. The module also supports a transparent UART mode, where serial data sent to the module is automatically relayed over the Bluetooth link to a paired device, simplifying data transfer applications.

While the datasheet provides the complete specifications, typical operation with a 3.0V to 4.2V supply involves managing active transmission and audio processing currents. For design, you should budget for peak currents during RF transmission (at +4 dBm output) and audio decoding. The module is designed for portable, battery-powered applications, so reviewing the detailed current consumption graphs in the official Microchip Technology datasheet for your specific use case (streaming, connected, standby) is critical for accurate power system design.