Small Size Bluetooth Module Airoha Chipset For Mesh Application

Small Size Bluetooth Module Airoha Chipset For Mesh Application

FSC-BT681 is a Small size bluetooth module airoha chipset for mesh application. The wide profile includes optimizes network and application processors as well as an standalone solution combining both in a single module.
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Product Details

The FSC-BT681 is a highly integrated Bluetooth module which integrates baseband, radio, small form factor, external antenna interface and flash memory. It meets the Bluetooth Version 5.0 specification. For MESH equipment applications, the embedded 4Mibit flash is flexible and allows for custom software development.


*Bluetooth V5.0
*Bluetooth low energy
*Bluetooth mesh network firmware optional
*Embedded 32-bit MCU
*Embedded 4Mbit Flash ,64KB SRAM
*UART programming and data interface (baudrate can up to 921600bps)
*UART/I2C/SPI/PWM control interfaces
*Transmit power: 9.5dBm
*Receiving sensitivity: -94dBm
*Postage stamp sized form factor
*Support External Antenna

2.Block Diagram and PIN Diagram



3  General Purpose Analog IO

FSC-BT681 contains One 12-bit successive approximation analog-to-digital converter (ADC) with 1 single-end external input channels, performing conversions in the single-shot or scan mode. In scan mode, automatic conversion is performed on a selected group of analog inputs.


 4  General Purpose Digital IO

There are 13 general purpose digital IOs defined in the module. All these GPIOs can be configured by software to realize various functions, such as button controls, LED drives or interrupt signals to host controller, etc. Do not connect them if not use.

The I/O type of each I/O pins can be configured by software individually as Input or Push-pull output mode. After the chip is reset, the I/O mode of all pins is input mode with no pull-up and pull-down enable. Each I/O pin has an individual pull-up and pull-down resistor which is about 40 kΩ for VDD and Vss.


 5  RF Interface

For This Module, the default mode for antenna is external antenna.

The user can connect a 50 ohm antenna directly to the RF port.

2402–2480 MHz Bluetooth 5.

TX output power of +9.5dBm.

Receiver to achieve maximum sensitivity -94dBm.

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