Hardware Design

[中文版]

Module Pin Description

FSC-BT9101AI

Module Pin Diagram:

bt9101

Pin Description:

Pin

Pin Name

Type

Descriptions

1

UART_TX

I/O

UART Data Out.

2

UART_RX

I/O

UART Data In.

3

UART_CTS

I/O

UART Clear to Send (active low).

4

UART_RTS

I/O

UART Request to Send (active low).

9

Tran/CMD

I/O

Host MCU change UART transmission mode.(Default)
H = Command mode.
L = Throughput mode.

10

Disc

I/O

Host MCU disconnect Bluetooth.(Default)

11

RESET

I

External reset input: Active LOW.
Set this pin low reset to initial state.

12

VDD

Power

Power supply voltage 3.3V~3.6V.

13

GND

Vss

Power Ground

16

FW_URXD

I/O

Firmware download RXD.

17

FW_UTXD

I/O

Firmware download TXD.

29

I2C_SCL

I/O

I2C_SCL

30

I2C_SDA

I/O

I2C_SDA

31/32

PA5

I/O

LED
Power On: Light Slow Shinning.
Connected: Steady Lighting.

33

PA4

I/O

BT Status
Connected: High.
Not connected: low

36

EXT_ANT

O

RF signal output.
If you need to use an external antenna, you can shield the onboard antenna by modifying the module on the 0R resistor. Or contact Feasycom to modify.

FSC-BT9104DI

Module Pin Diagram:

BT9104

Pin Description:

Pin

Pin Name

Type

Pin Descriptions

1

GND

GND

Power Ground

3

PA9

I/O

BT Status,
H=Connected,
L=No connection.

5

FW_URXD

I

Firmware download RXD.

6

FW_UTXD

O

Firmware download TXD.

8

GND

Vss

Power Ground

9

VDD_3V3

VDD

Power supply voltage 3.3V

10

RST

I

External reset input: Active LOW.

11

UART_RX

I

UART data input.

12

UART_TX

O

UART data output.

13

UART_RTS

I/O

UART request to send active low.

14

UART_CTS

I/O

UART clear to send active low.

15

GND

Vss

Power Ground

16

RF

RF_IN/OUT

Bluetooth 50ohm transmitter output/receiver input.
NC if using internal anternna(default).
Connect to external antenna(optional).

Hardware Design Note

  • In simple test environment, the module can be used for basic testing and operation by simply connecting VDD, GND, UART_RX, and UART_TX.

  • If the MCU needs to obtain the connection status of the Bluetooth module, it needs to be connected to the STATUS pin.

  • After drawing the schematic diagram, please send it to Feasycom for review to avoid Bluetooth distance not achieving the best effect.