Development Kit - User Manual

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Figure 3-3 RPLIDAR A3 Pins Reference Design

Pin Definition for the USB Adapter

The USB adapter is also using XH2.54-5P specification socket, and it can be

connected with RPLIDAR A3 directly. The pin definition is the same as the RPLIDAR

A3.

USB-DC power cord instruction

The developer kit provides USB-DC power cord for the user to connect additional

power to the USB adapter for additional power supply. For the output voltage and

current requirements of the power supply, please refer to the datasheet of the

corresponding lidar model.

Configure RPLIDAR A3 Scan Frequency

The motor speed control signal MOTOCTL can be configured directly via the USB

adapter of RPLIDAR A3. Therefore, the RPLIDAR A3’s scan frequency can be

modified by invoking the related functions in the SDK to configure the motor

speed.

Without the USB adapter, users can also control the speed by setting the PWM

duty cycle of MOTOCTL. Please note that the PWM frequency is 20kHz. For more

detailed parameter and index, please refer to the datasheet.

Please refer to the RPLIDAR protocol and application note for more information

and the SDK for the sample code on RPLIDAR scan frequency.

V5.0

GND

MOTOCTL

Power

(5V DC)

UART

PWM Generator

MCU/DSP

RPLIDAR