Beginner
10 min

Synchronize and secure your SPI data flow effortlessly with DCL541A01 and STM32F302VC

Isolate to elevate: Transforming SPI communication with precision and power!

SPI Isolator 5 Click with CLICKER 4 for STM32F302VCT6

Published Jul 22, 2025

Click board™

SPI Isolator 5 Click

Dev. board

CLICKER 4 for STM32F302VCT6

Compiler

NECTO Studio

MCU

STM32F302VC

Our SPI isolator ensures data integrity by providing a robust barrier against electrical noise, guaranteeing a seamless and secure serial interface.

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Hardware Overview

How does it work?

SPI Isolator 5 Click is based on the DCL541A01, a high-speed quad-channel digital isolator from Toshiba Semiconductor. The DCL541A01 stands out with its exceptional performance capabilities, made possible by leveraging Toshiba's advanced CMOS technology and a magnetic coupling structure. Not only does it meet the stringent safety standards of UL 1577 certification, but it also boasts an impressive withstand voltage rating of 5kVrms. Furthermore, its operating range spans from 2.25V to 5.5V, enabling seamless integration with lower voltage systems and facilitating voltage translation functionality across isolation barriers. With its versatility, this Click board™ is well-suited

for various applications, including industrial automation systems, motor control, inverters, and more. SPI Isolator 5 Click communicates with an MCU using the SPI serial interface with a maximum data rate of 150Mbps. The isolated lines are divided into two groups with the same lines. The first group comes in the form of 5 screw terminals, while the second forms a classic male 5-header row for easier jumper wire usage. Both groups of connectors have the same functions. You can distinguish the power VDD2 and GND2 lines from the data lines, which are CS2, SCK2, SDI2, SDO2, and DIS2. The DIS and DIS2 pins have the same function: to disable the lines from the

side of the isolator on which they are located. By setting the DIS pin to a high logic level, the input signals are disabled, and by setting it to a low logic level, they are enabled. The isolator can work with external supply voltages from 2.25V up to 5.5V, and the existence of an external power supply is easily visible using the PWR2 LED indicator. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL switch. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, it comes equipped with a library containing functions and an example code that can be used as a reference for further development.

SPI Isolator 5 Click hardware overview image

Features overview

Development board

Clicker 4 for STM32F3 is a compact development board designed as a complete solution, you can use it to quickly build your own gadgets with unique functionalities. Featuring a STM32F302VCT6, four mikroBUS™ sockets for Click boards™ connectivity, power managment, and more, it represents a perfect solution for the rapid development of many different types of applications. At its core, there is a STM32F302VCT6 MCU, a powerful microcontroller by STMicroelectronics, based on the high-

performance Arm® Cortex®-M4 32-bit processor core operating at up to 168 MHz frequency. It provides sufficient processing power for the most demanding tasks, allowing Clicker 4 to adapt to any specific application requirements. Besides two 1x20 pin headers, four improved mikroBUS™ sockets represent the most distinctive connectivity feature, allowing access to a huge base of Click boards™, growing on a daily basis. Each section of Clicker 4 is clearly marked, offering an intuitive and clean interface. This makes working with the development

board much simpler and thus, faster. The usability of Clicker 4 doesn’t end with its ability to accelerate the prototyping and application development stages: it is designed as a complete solution which can be implemented directly into any project, with no additional hardware modifications required. Four mounting holes [4.2mm/0.165”] at all four corners allow simple installation by using mounting screws. For most applications, a nice stylish casing is all that is needed to turn the Clicker 4 development board into a fully functional, custom design.

CLICKER 4 for STM32F302VCT6 double image

Microcontroller Overview

MCU Card / MCU

STM32F302VC Image

Architecture

ARM Cortex-M4

MCU Memory (KB)

256

Silicon Vendor

STMicroelectronics

Pin count

100

RAM (Bytes)

40960

Used MCU Pins

mikroBUS™ mapper

NC
NC
AN
Signal Disable
PC15
RST
SPI Chip Select
PA4
CS
SPI Clock
PA5
SCK
SPI Data OUT
PA6
MISO
SPI Data IN
PA7
MOSI
Power Supply
3.3V
3.3V
Ground
GND
GND
NC
NC
PWM
NC
NC
INT
NC
NC
TX
NC
NC
RX
NC
NC
SCL
NC
NC
SDA
Power Supply
5V
5V
Ground
GND
GND
1

Take a closer look

Click board™ Schematic

SPI Isolator 5 Click Schematic schematic

Step by step

Project assembly

PIC32MZ MXS Data Capture Board front image hardware assembly

Start by selecting your development board and Click board™. Begin with the CLICKER 4 for STM32F302VCT6 as your development board.

PIC32MZ MXS Data Capture Board front image hardware assembly
Thermo 21 Click front image hardware assembly
Thermo 21 Click complete accessories setup image hardware assembly
Board mapper by product6 hardware assembly
Necto image step 2 hardware assembly
Necto image step 3 hardware assembly
Necto image step 4 hardware assembly
Necto image step 5 hardware assembly
Necto image step 6 hardware assembly
PIC32MZ MXS Data Capture Board NECTO MCU Selection Step hardware assembly
Necto No Display image step 8 hardware assembly
Necto image step 9 hardware assembly
Necto image step 10 hardware assembly
Necto image step 11 hardware assembly

Track your results in real time

Application Output

1. Application Output - In Debug mode, the 'Application Output' window enables real-time data monitoring, offering direct insight into execution results. Ensure proper data display by configuring the environment correctly using the provided tutorial.

2. UART Terminal - Use the UART Terminal to monitor data transmission via a USB to UART converter, allowing direct communication between the Click board™ and your development system. Configure the baud rate and other serial settings according to your project's requirements to ensure proper functionality. For step-by-step setup instructions, refer to the provided tutorial.

3. Plot Output - The Plot feature offers a powerful way to visualize real-time sensor data, enabling trend analysis, debugging, and comparison of multiple data points. To set it up correctly, follow the provided tutorial, which includes a step-by-step example of using the Plot feature to display Click board™ readings. To use the Plot feature in your code, use the function: plot(*insert_graph_name*, variable_name);. This is a general format, and it is up to the user to replace 'insert_graph_name' with the actual graph name and 'variable_name' with the parameter to be displayed.

Software Support

Library Description

This library contains API for SPI Isolator 5 Click driver.

Key functions:

  • spiisolator5_write - SPI Isolator 5 data writing function.

  • spiisolator5_read - SPI Isolator 5 data reading function.

  • spiisolator5_transfer - SPI Isolator 5 transfer 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 SPI Isolator 5 Click example
 *
 * # Description
 * This example demonstrates the use of SPI Isolator 5 Click board 
 * by reading the manufacturer ID and device ID 
 * of the connected Flash 11 Click board.
 *
 * The demo application is composed of two sections :
 *
 * ## Application Init
 * The initialization of SPI module, log UART, and additional pins.
 * After the driver init, the app performs enabling a device.
 *
 * ## Application Task
 * The demo application reads and checks the manufacturer ID and 
 * device ID of the connected Flash 11 Click board. 
 * Results are being sent to the UART Terminal, where you can track their changes.
 *
 * @author Nenad Filipovic
 *
 */

#include "board.h"
#include "log.h"
#include "spiisolator5.h"

#define FLASH11_CMD_GET_ID         0x90, 0x00, 0x00, 0x00, 0x00, 0x00
#define FLASH11_MANUFACTURER_ID    0x1F
#define FLASH11_DEVICE_ID          0x15

static spiisolator5_t spiisolator5;
static log_t logger;

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    spiisolator5_cfg_t spiisolator5_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.
    spiisolator5_cfg_setup( &spiisolator5_cfg );
    SPIISOLATOR5_MAP_MIKROBUS( spiisolator5_cfg, MIKROBUS_1 );
    if ( SPI_MASTER_ERROR == spiisolator5_init( &spiisolator5, &spiisolator5_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    spiisolator5_enable( &spiisolator5 );
    Delay_ms ( 100 );
    
    log_info( &logger, " Application Task " );
    log_printf( &logger, " -----------------------\r\n" );
    Delay_ms ( 100 );
}

void application_task ( void )
{
    static uint8_t cmd_get_id[ 6 ] = { FLASH11_CMD_GET_ID };
    static uint8_t read_id[ 6 ] = { 0 };
    if ( SPIISOLATOR5_OK == spiisolator5_transfer( &spiisolator5, &cmd_get_id[ 0 ], &read_id[ 0 ], 6 ) )
    {
        if ( ( FLASH11_MANUFACTURER_ID == read_id[ 4 ] ) && ( FLASH11_DEVICE_ID == read_id[ 5 ] ) )
        {
            log_printf( &logger, " Manufacturer ID: 0x%.2X\r\n", ( uint16_t ) read_id[ 4 ] );
            log_printf( &logger, " Device ID: 0x%.2X    \r\n", ( uint16_t ) read_id[ 5 ] );
            log_printf( &logger, " -----------------------\r\n" );
            Delay_ms ( 1000 );
            Delay_ms ( 1000 );
            Delay_ms ( 1000 );
        }
    }
}

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

Additional Support

Resources

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