User's Manual

according to the actual situation.
The reserved welding pad can be used to directly weld
the copper wire antenna
3 GND
Modular input
4 AIO[1]
Customizable analog IO pin;
5 AIO[2]
Customizable analog IO pin;
6 AIO[3]
Customizable analog IO pin;
7 UART_TX
Module serial port, can be customized as GPIO
function;
8 UART_RX
Module serial port, can be customized as GPIO
function;
9 WWHITE
Warm-white PWM output, high efficiency; Can be
customized as GPIO function
10 CWHITE
Cold white PWM output, high efficiency; Can be
customized as GPIO function
11 PWM5
Reserved PWM output pin, can be customized for
GPIO function
12 INT0
The system interrupt input port can be customized as
GPIO function if low power mode is not used
13 IIC_SDA
Can be customized as GPIO function;
14 IIC_SCL
Can be customized as GPIO function;
15 RED
Red PWM output, high efficiency; Can be customized
as GPIO function
16 GREEN
Green PWM output, high efficiency; Can be
customized as GPIO function
17 BLUE
Blue PWM output, high efficiency; Can be customized
as GPIO function
18 RST_N
System reset pin, internal default pull-up, if not
necessary, please suspend or reserve TestPoint
19 SWCLK
Module debug port, suspended or reserved TestPoint
20 SWDIO
Module debug port, suspended or reserved TestPoint
21 VCC
3.3V DC power input
22 GND
Modular input
Table 2: Pin description of the RL61A1 Bluetooth module
Note 1: Pin numbers start from the first on the upper left of the module and are arranged
counterclockwise.
Note 2: The function and pin definitions of this module will vary slightly when used as different
devices, refer to the detailed documentation for the corresponding firmware.
RL61A1 Bluetooth Module
User manual