Detect falls and impacts easily with MXC62320MP and STM32L496AG

Making sense of motion: The magic of accelerometers

Accel 17 Click with Discovery kit with STM32L496AG MCU

Published Jul 22, 2025

Click board™

Accel 17 Click

Dev. board

Discovery kit with STM32L496AG MCU

Compiler

NECTO Studio

MCU

STM32L496AG

This solution is invaluable for measuring and analyzing changes in velocity and acceleration, providing essential data for a wide range of purposes

Hardware Overview

How does it work?

Accel 17 Click is based on the MXC62320MP, a complete dual-axis acceleration measurement system fabricated on a monolithic CMOS process from MEMSIC. The MXC62320MP operation is based on heat transfer by natural convection and operates like other accelerometers, except it is a gas in the MEMSIC sensor. It can measure dynamic acceleration (e.g., vibration) and static acceleration (e.g., gravity), with full-scale acceleration measurements ranging from ±2g. It also comes with embedded Power Up/Down and self-test function, resolution better than 1mg, and >50.000g shock survival rating. In addition to all

these features, it also has excellent temperature stability and low power consumption/low active current. This accelerometer can enter a Power-Down mode by writing a command [xxxxxxx1] into the accelerometer’s internal register, while a Wake-Up operation is performed when a command of [xxxxxxx0] is written into the same register. Note that the MXC62320MP needs about 75ms (typical) for Power-Up time. Accel 17 Click communicates with MCU using a standard I2C 2-Wire interface that supports 400kHz Fast Mode operation. Since the sensor for operation requires a 3.3V logic voltage level only, this Click board™

also features the PCA9306 voltage-level translator from Texas Instruments. The I2C interface bus lines are routed to the dual bidirectional voltage-level translator, allowing this Click board™ to work properly with both 3.3V and 5V MCUs. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VIO SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this 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.

Features overview

Development board

The 32L496GDISCOVERY Discovery kit serves as a comprehensive demonstration and development platform for the STM32L496AG microcontroller, featuring an Arm® Cortex®-M4 core. Designed for applications that demand a balance of high performance, advanced graphics, and ultra-low power consumption, this kit enables seamless prototyping for a wide range of embedded solutions. With its innovative energy-efficient

architecture, the STM32L496AG integrates extended RAM and the Chrom-ART Accelerator, enhancing graphics performance while maintaining low power consumption. This makes the kit particularly well-suited for applications involving audio processing, graphical user interfaces, and real-time data acquisition, where energy efficiency is a key requirement. For ease of development, the board includes an onboard ST-LINK/V2-1

debugger/programmer, providing a seamless out-of-the-box experience for loading, debugging, and testing applications without requiring additional hardware. The combination of low power features, enhanced memory capabilities, and built-in debugging tools makes the 32L496GDISCOVERY kit an ideal choice for prototyping advanced embedded systems with state-of-the-art energy efficiency.

Discovery kit with STM32L496AG MCU double side image

Microcontroller Overview

MCU Card / MCU

Architecture

ARM Cortex-M4

MCU Memory (KB)

1024

Silicon Vendor

STMicroelectronics

Pin count

169

RAM (Bytes)

327680

Used MCU Pins

mikroBUS™ mapper

RST

SCK

MISO

MOSI

Power Supply

3.3V

Ground

GND

PWM

INT

I2C Clock

PB8

SCL

I2C Data

PB7

SDA

Power Supply

Ground

GND

Take a closer look

Click board™ Schematic

Step by step

Project assembly

Discovery kit with STM32H750XB MCU front image hardware assembly

Start by selecting your development board and Click board™. Begin with the Discovery kit with STM32L496AG MCU as your development board.

Thermo 21 Click front image hardware assembly

Board mapper by product7 hardware assembly

Discovery kit with STM32H750XB MCU NECTO MCU Selection Step hardware assembly

Necto No Display image step 8 hardware assembly

Software Support

Library Description

This library contains API for Accel 17 Click driver.

Key functions:

accel17_get_axes_data - Accel data reading
accel17_generic_read - Reading function
accel17_generic_write - Writing function

Open Source

Code example

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

/*!
 * @file main.c
 * @brief Accel17 Click example
 *
 * # Description
 * This example showcases ability of the device to read
 * x, y axis orientation.
 *
 * The demo application is composed of two sections :
 *
 * ## Application Init
 * Initialization of communication modules(I2C, UART), and
 * configures device.
 *
 * ## Application Task
 * Reads axis data and calculates it and logs result every 300ms.
 *
 * @author Luka Filipovic
 *
 */

#include "board.h"
#include "log.h"
#include "accel17.h"

static accel17_t accel17;
static log_t logger;

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    accel17_cfg_t accel17_cfg;  /**< Click config object. */

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );

    // Click initialization.
    accel17_cfg_setup( &accel17_cfg );
    ACCEL17_MAP_MIKROBUS( accel17_cfg, MIKROBUS_1 );
    err_t init_flag = accel17_init( &accel17, &accel17_cfg );
    if ( I2C_MASTER_ERROR == init_flag ) 
    {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

    accel17_default_cfg ( &accel17 );
    Delay_ms ( 1000 );
    log_info( &logger, " Application Task " );
}

void application_task ( void ) 
{
    accel17_axes_t axes;
    accel17_get_axes_data ( &accel17, &axes );
    log_printf( &logger, " > X[degree]: %.2f\r\n > Y[degree]: %.2f\r\n", axes.x, axes.y );
    log_printf( &logger, "*********************************\r\n" );
    Delay_ms ( 300 );
}

int main ( void ) 
{
    /* Do not remove this line or clock might not be set correctly. */
    #ifdef PREINIT_SUPPORTED
    preinit();
    #endif
    
    application_init( );
    
    for ( ; ; ) 
    {
        application_task( );
    }

    return 0;
}

// ------------------------------------------------------------------------ END