Microchip Technology IS2083 User Manual

 2021 Microchip Technology Inc. DS00003118C-Page 1
INTRODUCTION
The BM83 module is a flash-based Bluetooth Stereo
Audio module built using Microchip’s IS2083 SoC. The
turnkey solution as mentioned in Table 1 integrates the
Bluetooth stack, profiles, and audio/voice processing to
enable Bluetooth audio capability and customize DSP
tuning for an end user application.
This application note describes how to implement and
use the following solutions using the BM83 module:
• Multi-Speaker (MSPK):
- Microchip's Wireless Concert Technology
(WCT) is a distributed audio solution that
synchronizes multiple speakers from one
audio source. This is also known as Multi-
speaker (MSPK) solution.
• Audio Transceiver (AT):
- With AT firmware, the BM83 serves as an
audio source that transmits A2DP music to
standard Bluetooth devices.
• Google Fast Pairing (GFP):
- Uses Bluetooth Low Energy to discover
nearby Android devices, thus eliminating
some of the steps in pairing process.
The BM83 supports the following standard features
along with other features listed in the following table.
• HFP, A2DP and AVRCP
• Audio Mixer
• Bluetooth Low Energy Transparent Service
• OTA Tuning and OTA DFU
• UART Command for Host MCU
• Microchip Bluetooth Audio (MBA) App
Compatibility
The Microchip Bluetooth Audio (MBA) mobile app
connects to the BM83 Bluetooth devices to create an
audio network, adjust EQ settings, volume control, and
perform Over-the-Air (OTA) DSP tuning and firmware
upgrade functions.
Table 1 lists the firmware targets created to support
different functionality as memory constraints do not
allow all features to be implemented in one firmware
image. Each target consists of a firmware image and
default configuration settings. The firmware targets are:
• Phone Book Access Profile (PBAP)
• Google Fast Pairing (GFP)
• Serial Port Profile (SPP)
• Audio Transceiver (AT)
The Config GUI Tool is provided along with the BM83
module to optimize the Noise Reduction (NR), Acoustic
Echo Cancellation (AEC), Audio Mixer and Equalizer
(EQ) Filtering. The BM83 module supports the
following modes:
• Host mode (default configuration):
- Uses the host MCU for advanced system
control
- See Figure 53 to enable this mode using the
Config GUI Tool
TABLE 1: FEATURES SUPPORTED BY BM83
Features
Firmware Targets
PBAP GFP SPP AT
Type Code and Binary Image
Standard Features Y Y Y Y (Rx mode)
A2DP Source N N N Y (Tx mode)
PBAB Y N N N
iAP2/SPP N N Y N
MSPK N Y Y N
AVCRP Browsing YNYN
Google Fast Pair N Y N N
Legend: Y = Supported, N = Not supported
AN3118
IS2083/BM83 Bluetooth
®
Applications Design Guide

Microchip Technology IS2083 Specifications

General

Brand	Microchip Technology
Model	IS2083
Category	Microcontrollers
Language	English

Summary

Multi-Speaker Solution

MSPK Demo Requirements

Lists software, hardware, and tools for the MSPK demo setup.

MSPK Demo Setup

Step-by-step guide for setting up MSPK demo in embedded and host modes.

Concert Mode Demo

Procedure for setting up and operating Concert Mode for multi-speaker audio playback.

Stereo Mode Demo

Procedure for setting up and operating Stereo Mode for multi-speaker audio playback.

Concert Mode Provisioning Using Microchip Bluetooth Audio App

Utilizes the mobile app for provisioning Concert Mode in multi-speaker configurations.

Quick Central/Peripheral Speakers Setup

Streamlined process for establishing central and peripheral speaker roles.

Renaming Speaker

Instructions on how to change the name of individual speakers in the system.

Equalizer Setting

How to adjust audio equalizer parameters via the mobile application.

Audio Transceiver Solution

AT Demo Requirements

Outlines software, hardware, and tools necessary for the AT demo.

AT Demo Setup

Detailed steps for configuring the Audio Transceiver in embedded and host modes.

Audio Input to BM83 Source

Explains connecting audio sources like Aux-in and I2S to the BM83 for transmission.

A2DP Source Mode

Using the BM83 as an A2DP source to stream audio to connected sink devices.

BM83 Google Fast Pair

Demo Setup

Steps to enable Google Fast Pair for effortless and quick Bluetooth device connection.

Audio Mixer Mode

Appendix B: Customizing UI and DSP Parameters

Customizing UI Parameters

Guide to personalize user interface settings using the Config GUI tool.

Customizing DSP Parameters

Steps for configuring and fine-tuning Digital Signal Processor (DSP) parameters.

Appendix L: DFU- Over-The-Air Upgrade Procedure

Rehexing Upgradeable OTA Image

Process for preparing firmware images for Over-the-Air (OTA) updates.

OTA DFU Using Android MBA

Instructions for performing OTA firmware updates via the Android Microchip Bluetooth Audio app.

OTA DFU Using iOS MBA

Instructions for performing OTA firmware updates via the iOS Microchip Bluetooth Audio app.

Appendix P: Using iOS MBA for OTA DSP Tuning

Audio and Voice Tuning

Real-time adjustment of audio and voice parameters through the iOS MBA app.

Appendix Q: Enabling Google Fast Pairing Features

Enabling GFP in Config GUI Tool

Configuration steps for Google Fast Pair within the Config GUI tool.

Enabling GFP on the Android Phone

How to enable and use Google Fast Pair functionality on an Android smartphone.