BM20/23 Bluetooth Stereo Audio Module Introduction The BM20/23 stereo audio module is a Bluetooth v5.0 (BDR/EDR) audio module for designers to add wireless audio and voice applications to their products. This Bluetooth SIG-certified module provides a complete wireless solution with Bluetooth stack, integrated antenna, and worldwide radio certifications in a compact surface mount package. This stereo module contains a built-in Li-Ion charger and a digital audio interface (BM23). It supports HSP, HFP, SPP, A2DP, and AVRCP profiles. Both AAC and SBC Codecs are supported for A2DP. Note: The customers must connect their own external analog Codec/DSP/amplifier and MCU for audio output. Figure 1.BM20 and BM23 Module BM20 BM23 Features Qualified for Bluetooth v5.0 Specification HFP v1.6, HSP v1.1, A2DP v1.2, AVRCP v1.5, SPP v1.0, PBAP v1.0 Bluetooth Classic, Basic Rate/Enhanced Data Rate (BDR/EDR) On-Board Embedded Bluetooth Stack Easy to Configure with Windows Graphical User Interface (GUI) or Direct by Microcontroller Unit (MCU) Compact Surface Mount Module: 29 x 15 x 2.5 mm Castellated surface mount pads Datasheet DS70005406B-page 1 2019 Microchip Technology Inc. BM20/23 Integrated 3V and 1.8V Configurable Switching Regulator and LDO Built-in Lithium-ion Battery Charger (up to 350 mA) Built-in ADC for Battery Monitor and Voltage Sense Audio-In/Out 2 BM23 supports digital audio I S format BM20 supports analog audio output Transparent Universal Asynchronous Receiver/Transmitter (UART) Mode for Seamless Serial Data Over UART Interface Integrated Crystal Oscillator and Matching Circuitry Secure AES128 Encryption RF/Analog Frequency Spectrum: 2.402 GHz to 2.480 GHz Receive Sensitivity: -91 dB (/4 DQPSK) Transmitter Output Power: +4 dBm (maximum) for Class 2 Audio processor Support 64 Kbps A-Law, -Law PCM format/Continuous Variable Slope Delta Modulation (CVSD) for SCO Channel Operation Noise Reduction (NR) and Acoustic Echo Cancellation (ACE) Sub-Band Coding (SBC) and Optional Advanced Audio Coding (AAC) Decoding Packet Loss Concealment (PLC) Four Languages (Chinese/ English/ Spanish/ French) Voice Prompts Support (20 events for each language) using the IS20XXS UI tool Serial Copy Management System (SCMS-T) Content Protection Audio Codec 20-Bit Digital-to-Analog Converter (DAC) and 16-bit Analog-to-Digital Converter (ADC) Codec 98 dB Signal-to-Noise ratio (SNR) DAC Playback Peripherals One Line-in Port for External Audio Input Two LED Drivers One UART Interface Multiple I/O Pins for Control and Status High-Speed HCI-UART Interface (supports up to 921,600 bps) Antenna PCB Antenna Compliance Bluetooth Special Interest Group (SIG) Certified: BM20 QDID: 121137 BM23 QDID: 121137 DS70005406B-page 2 Datasheet 2019 Microchip Technology Inc.