原标题：Microchip BM20蓝牙4.1立体声音频模块评估方案

　　microchip公司的 BM20是蓝牙4.1(BDR/EDR)立体声音频模块,封装尺寸29x15x2.5 mm3,提供蓝牙堆栈,集成天线和世界范围无线证书,是完整的无线解决方案.器件内置锂电池充电器和数字音频接口,支持HSP, HFP, SPP, A2DP和AVRCP,AAC和SBC CODEC支持A2DP,主要用在蓝牙条形音响和蓝牙立体声扬声器电话.本文介绍了BM20模块主要特性,参考电路和应用框图,以及BM20蓝牙模块评估板主要特性,框图,电路图,NAU8223 3.1WD类放大器电路图.

　　Stereo module 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.

　　BM20主要特性:

　　BM20应用:

　　Bluetooth sound bar

　　Bluetooth stereo speaker phone

　　图1.BM20应用框图

　　BM20蓝牙模块评估板

　　This user’s guide describes the hardware and software setup for the BM20 Bluetooth® Evaluation Board. This board contains the hardware needed to evaluate the BM20 Bluetooth module. The BM20 module is mounted to an evaluation board that demonstrates the module’s key features.

　　BM20蓝牙模块评估板包括:

　　BM20蓝牙模块评估板主要特性:

　　图3.BM20蓝牙模块评估板外形图

　　图4.BM20蓝牙模块评估板框图

　　图.BM20蓝牙模块评估板NAU8223 3.1WD类放大器子板外形图