DC MOTOR 4 click

How does it work?

DC Motor 4 Click is based on the MAX14870, a compact full-bridge DC motor driver from Analog Devices. The driver integrates a short-circuit-protected driver, thermal-shutdown under-voltage lockout, and a separate voltage-sense input that reduces current sensing errors due to parasitic trace resistance. The MAX14870 has a simplified design without a charge pump, and the current is regulated over a sense resistor. The DC Motor 4 Click can supply a connected motor over the external power supply and a screw terminal or by 5V of the mikroBUS™ socket’s rail. You can select power supply input over the MOTOR PWR header jumper, while the 5V of the mikroBUS™ socket’s rail is set by default.

DC Motor 4 Click support changing the direction of the rotation of the connected motor, it can also brake the motor’s rotation, shut the driver down, and regulate the current, thus the motor’s speed. It also features fault output signals for thermal overload and overcurrents. However, the MAX14870 also features an auto-retry mode that will try to enable the driver’s outputs after a 2ms timeout, and if the problem persists, the drivers will be disabled.

DC Motor 4 Click uses a pulse-width modulation signal from the host MCU over the PWM to set the speed of the motor. You can set the rotation direction over the DIR pin. MAX14870 will output the fault statuses over the FLT pin, and the EN pin is used to enable or disable the motor driver.

This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the I/O SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.

Specifications

Pinout diagram

This table shows how the pinout on DC MOTOR 4 click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
Rotation Direction	DIR	1	AN	PWM	16	PWM	PWM Control
	NC	2	RST	INT	15	FLT	Fault Interrupt
Enable Driver	EN	3	CS	RX	14	NC
	NC	4	SCK	TX	13	NC
	NC	5	MISO	SCL	12	NC
	NC	6	MOSI	SDA	11	NC
Power Supply	3.3V	7	3.3V	5V	10	5V	Power Supply
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

RDC MOTOR 4 Click electrical specifications

Software Support

We provide a library for the DC Motor 4 Click as well as a demo application (example), developed using MIKROE compilers. The demo can run on all the main MIKROE development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for DC Motor 4 Click driver.

Key functions

• Generic sets PWM duty cycle.

• Stop PWM module.

• Start PWM module.

Example Description

The click is designed to run on either 3.3V or 5V power supply.

 void application_task ( void ) 
 { 
     counter_clockwise( ); 

     clockwise( ); 
 }

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.DcMotor4

Additional notes and informations

Depending on the development board you are using, you may need USB UART click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MIKROE compilers.

mikroSDK

This Click board™ is supported with mikroSDK – MIKROE Software Development Kit. To ensure proper operation of mikroSDK compliant Click board™ demo applications, mikroSDK should be downloaded from the LibStock and installed for the compiler you are using.

For more information about mikroSDK, visit the official page.