Fully-certified Bluetooth® 4.1 Stereo Audio Module, Perfect for Portable Battery Operated Devices

PublishTime： 2021-08-13 Article Source：ISSC

Stereo module BM20/BM23 is a fully-certified Bluetooth^® Version 4.1 (BDR/EDR) module for designers who want to add Bluetooth^®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, 29x15x2.5 mm³. This stereo module built-in Li-ion charger and BM23 contain a digital audio interface. It supports HSP, HFP, SPP, A2DP, and AVRCP profiles. Both AAC and SBC codecs are supported for A2DP. Note that the customer must connect their own external analog CODEC/DSP/amplifier and MCU for audio output.

Features：

●Complete, Fully Certified, Embedded 2.4 GHz Bluetooth^® Version 4.1 Module

●Bluetooth Classic (BDR/EDR)

●Bluetooth SIG Certified

●Onboard embedded Bluetooth Stack

●Transparent UART mode for seamless serial data over UART interface

●Easy to configure with Windows GUI or direct by MCU

●Firmware can be field upgradable via UART

●Compact surface-mount module: 29 x 15 x 2.5 mm³

●Castellated surface mount pads for easy and reliable host PCB mounting

●Environmentally friendly, RoHS compliant

●Perfect for Portable Battery Operated Devices

●Internal Battery Regulator Circuitry

●Worldwide regulatory certifications

●Audio-In/Out

BM23 supports digital audio I²S format.

BM20 supports analog audio output.

Operational：

●Operating voltage: 3.0V to 4.2V

●Temperature range: ‐20°C to 70°C

●Simple, UART interface

●Integrated crystal, internal voltage regulator, and matching circuitry

●Multiple I/O pins for control and status

RF/Analog：

●Frequency: 2.402 to 2.480 GHz

●Receive Sensitivity: ‐91 dBm (2Mbps EDR)

●Power Output: class 2 / +4dBm max.

●Connection Distance: >10m (free space and no interference)

Audio processor：

●Support 64 kb/s A-Law or μ-Law PCM format, or CVSD (Continuous Variable Slope Delta Modulation) for SCO channel operation.

●Noise suppression

●Echo suppression

●SBC and optional AAC decoding

●Packet loss concealment

●Build-in four languages (Chinese/ English/Spanish/ French) voice prompts and 20 events for each one (This function can be set up in the "IS20XXS_UI" tool.)

●Support SCMS-T

Audio Codec：

●20 bit DAC and 16 bit ADC codec

●98dB SNR DAC playback

Peripherals：

●Built-in Lithium-ion battery charger (up to 350mA)

●Integrate 3V, 1.8V configurable switching regulator and LDO

●Built-in ADC for battery monitor and voltage sense.

●A line-in port for external audio input

●Two LED drivers

Flexible HCI interface：

●High-speed HCI-UART (Universal Asynchronous Receiver Transmitter) interface (up to 921600bps)

MAC/Baseband/Higher Layer：

●Secure AES128 encryption

●Bluetooth profiles

- HFP v1.6

- HSP v1.1

- A2DP v1.2

- AVRCP v1.5

- SPP v1.0

- PBAP v1.0

Antenna:

●Printed Antenna

Compliance:

●Bluetooth SIG QDID: 58996

●Module certified for the United States (FCC) and Canada (IC), European Economic Area (CE), Korea (LTA), Taiwan (NCC), and Japan (MIC)

Applications:

●Bluetooth soundbar

●Bluetooth stereo speakerphone

【Datasheet】BM20/BM23 Bluetooth® 4.1 Stereo Audio Module

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