2 Device Overview

The BM83 stereo audio module is built around the IS2083BM SoC, which integrates the dual-mode baseband, modem, radio transceiver, PMU, MCU, crystal and a DSP dedicated for audio and voice applications. Users can configure the BM83 module by using the SDK or the IS208x_Config_GUI_Tool (Config Tool).

There are two modes of operation:

  • Host mode:
    • Interfaces with an external MCU over UART for application specific system control
    • The MSPK solution and AT solution can reside on the external MCU
  • Embedded mode:
    • No external MCU involved
    • BM83 acts as an MCU to control all peripherals to provide various speaker features
    • Integrates the MSPK and AT solution on the module

Simple system control can be implemented using the SDK. DSP parameters such as equalizer settings can be set using the Config Tool.

Note: The SDK and Config Tool are available for download at: www.microchip.com/BM83.
The following figure illustrates the Embedded mode and Host mode of the BM83 module.
Figure 2-1. BM83 Module Application Modes

The following table provides the features of the BM83 module.

Table 2-1. BM83 Module Features

Features

BM83SM1

SoCIS2083BM
Pin Count50
Dimension32 mm x 15 mm
RF
PCB AntennaYes
TX Power (typical)+11 dBm (Class1) and +1 dBm (Class2)
RX Sensitivity-90 dBm (2 Mbps EDR)
Bluetooth Power ClassClass 1 and Class 2
RF ShieldYes
Audio
Audio DAC Output2-channel
DAC (Single-ended) SNR -95 dB
DAC (Capless) SNR -95 dB
ADC SNR -90 dB
I2S Audio (Input/Output) with Host Clock (MCLK) OutputYes
Analog Auxiliary InYes
Analog Microphone2
Stereo Digital Microphone1
External Audio Amp InterfaceYes
Power
Battery Input (BAT_IN)3.8V (typ.)
DC Adapter Input (ADAP_IN)5.0V (typ.)
Integrated BUCK RegulatorYes
Battery Charger (350 mA charging current max)Yes
Peripherals
UART (with HW flow control)Yes
I2C HostYes
USB (full speed USB v1.1 interface)Yes
SAR ADC2
PWM1
LED Driver2
GPIOs18
JTAG Debug Port (8051 MCU)2-wire