Hardware Design

[中文版]

Module Pin Diagram

Module Pin Description

Pin	Pin Name	Type	Pin Descriptions
1	UART_TX	O	UART TX
2	UART_RX	I	UART RX
5	I2S_CLK	I/O	I2S bit clock
6	I2S_OUT	O	I2S data output
7	I2S-IN	I	I2S data input
8	I2S-WS	I/O	Frame Sync Clock
11	RESET	I	active-low reset
12	VDD_3V3	I	3.3V power supply
13	GND		GND
16	MIC_BIAS	O	microphone bias voltage
17	MIC-	I	MIC negative
18	MIC+	I	MIC positive
19	SPK_L	O	left channel
20	SPK_R	O	right channel
32	PIO_9	I/O	operating status indicator Pin
33	PIO_10	I/O	connection indicator Pin
36	ANT		external antenna Pin

Application Schematic

Power-on Circuit Design

• To ensure the stable operation of the Bluetooth module, the power supply for the VDD_3V3 pin must reserve a current of ≥ 300mA for the Bluetooth module.

• If the power supply is converted from 5V to 3.3V, you can refer to the following optional recommended schematic diagram for design:

Hardware Design Note

• For the module’s simple test environment, you only need to connect VDD / GND / UART_RX / UART_TX to test and use it.

• After completing the PCB circuit schematic, please contact the staff of Feasycom for review to prevent the Bluetooth range from failing to reach the optimal performance.