Hardware Design

[中文版]

1. PIN Definition Descriptions

Pin Diagram：

BT986

Pin Description:

Pin

Pin Name

Type

Description

1

UART_TX

O

Serial Transmitter Data

2

UART_RX

I

Serial Receiver Data

3

UART_CTS

I/O

UART Clear to Send(no connection request)

4

UART_RTS

I/O

UART Request to Send(no connection request)

24

Tran/USB_DP/PIO1

I/O

UART mode control pin, H=command mode ,L=throughput mode

23

Disc/USB_DM/PIO0

I/O

Disconnect the connecting pin

11

RESET

I

Active-low reset input

12

VDD

Power

Power supply voltage 3.3V, LDO power supply preferred

13

GND

GND

GND

15

ICE

I/O

Writing firmware pin

32

LED

O

Bluetooth not connected to output square wave, Bluetooth connected to output high level

33

STATUS

O

Connection state, output. H=Connected , L=No connection

36

EXT_ANT

ANT

Changing the 0 ohm resistance near the antenna, it is possible to connect a Bluetooth antenna externally

Note：

To use the 23 and 24 pin control modules AT+PIOCFG command is required to enable the function

2 Hardware Design Note

  • The module only needs to be connected to VDD/GND/UART_RX/UART_TX ready to use.

  • 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.