Diversification of usage of Bluetooth A2DP profile

Until now, the Bluetooth A2DP profile is often used on the receiver side, such as Bluetooth speakers, conference call systems, musical instruments, and headsets, while the transmitter side mostly transmits audio from existing products, such as smartphones and tablets. It was a lot of things.

However, in recent years, the use of Bluetooth audio products has progressed, and the number of products that use a Bluetooth module on the transmitting side has increased. As a result, there has been an increase in requests from customers for modules on the A2DP transmission side.

In order to meet such customer demands, we would like to introduce the BM83 module from Microchip. In addition to the general A2DP transmission function, there is also a unique function that allows multiple audio receptions at the same time by arranging a competing receiver with the same product.

Equipped with Bluetooth audio transmission function (A2DP profile) for the first time in Microchip products

Microchip has released multiple Bluetooth audio module products, but this is the company's first product with an audio transmission function. This allows you to connect with Bluetooth headphones or speakers and transmit audio.

Of course, since it is also compatible with the receiving side, it is now possible to use it in a wider range of applications than the company's previous Bluetooth module products for audio.

Features of the BM83 module

• Equipped with an antenna that has already received radio wave certification and has an RF shield, enabling development in a short period of time.

• Small size (32mm x 15mm x 2.5mm) allows mounting in minimal space
• Bluetooth SIG certification has been obtained, reducing the man-hours required for logo certification
• Dual-mode Bluetooth and BLE (Bluetooth Low Energy) functionality
• Equipped with a UART interface, enabling Bluetooth communication with a simple program from a microcomputer
• Firmware can be updated with OTA (Over The Air) function

Radio Certification Acquired in 6 Regions and Countries

BM83 is certified by CE, FCC, ISED, MIC, KCC, NCC, and 6 regions and countries, so it can be used immediately in EU, USA, Canada, Japan, Korea, and Taiwan.
Therefore, it is possible to deploy products in these regions while significantly reducing the cost and time required for radio wave certification.

Realize multi-speaker solutions with unique functions

A multi-speaker function is equipped with Microchip's original function.

The diagram on the left shows the connection configuration in concert mode.

When you connect a smartphone and a master speaker and play audio, the audio can be sent from the master speaker to multiple slave speakers and played back with low latency.

This makes it possible to realize more powerful audio applications.

 

The figure on the left shows the connection configuration for stereo mode.

When the smartphone is connected to the master speaker and audio is played back, synchronized audio is played from the left and right speakers, creating stereo speakers.

"BM83" evaluation board for immediate evaluation

The BM83 Evaluation Board (Part Number: DM164152) comes with the following:

BM83 module (carry board for connection)

• On-board MCU for operation/demonstration (PIC32MX450F256L)

• Plug-in module for external microcomputer connection
• STMicroelectronics codec (STA369BW) daughter board
• 2 digital microphones (Knowles' SPH0641LU4H-1) daughter board
• J-Link 6-Pin adapter board for BM83 debugging (contact factory for information about the SDK)
• DC power adapter

-Various cables (speaker, power supply, USB)

If you prepare a separate PC, speaker, microphone, or headset, you can evaluate immediately.

Evaluation board block diagram

Application example

• bluetooth speaker
• Bluetooth headphones
• conference call system
• electronic musical instrument

Product Summary

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