Mikroelektronika d.o.o.
SPI Isolator 6 Click Board
SPI Isolator 6 Click Board
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Key Features
- Reinforced galvanic isolation for SPI communication, up to 200Mbps maximum data rate, withstands 3.75kVRMS for 60s, low power consumption, and more
- Based on the MAX22345 - four-channel digital isolator from Analog Devices
- Can be used for general SPI-bus isolation, industrial, process and building automation, programmable logic controllers, and many more
- mikroBUS: SPI Interface
Overview
The SPI Isolator 6 Click Board™ is a compact add-on board representing a digital isolator optimized for a serial peripheral interface. This board features the MAX22345, a fast, low-power 4-channel digital galvanic isolator from Analog Devices. This device comes with a maximum data rate of 200Mbps and transfers digital signals between circuits with different power domains featuring reinforced isolation for a withstand voltage rating of 3.75kVRMS for 60 seconds. This Click board™ is suitable for general SPI-bus isolation, industrial, process and building automation, programmable logic controllers, and many more.
The SPI Isolator 6 Click Board™ is supported by a mikroSDK compliant library, which includes functions that simplify software development. This Click board™ comes as a fully tested product, ready to be used on a system equipped with the mikroBUS™ socket.
How Does The SPI Isolator 6 Click Board™ Work?
The SPI Isolator 6 Click Board™ as its foundation uses the MAX22345, a four-channel digital isolator with a maximum data rate of 200Mbps from Analog Devices. The MAX22345 provides galvanic isolation for digital signals transmitted between two ground domains and can withstand up to 784Vpeak of continuous isolation and up to 3.75kVRMS for up to 60 seconds. Besides, it also offers low-power operation, high electromagnetic interference (EMI) immunity, and stable temperature performance through Analog's proprietary process technology. Both power pins' wide supply voltage range allows the MAX22345 to be used for level translation and isolation.
Because the SPI Isolator 6 Click Board™ represents an isolator for SPI communication, it logically communicates with the MCU precisely through that communication. As already mentioned, the MAX22345 has two power pins for the A and B isolation sides, where it is possible to supply its B side with external voltage in the range of 1.7 to 5.5V by applying it to the terminal marked with VCC_EXT. In addition to the external power supply terminal, this Click board ™ also possesses another two terminals to which the isolated SPI data communication lines are routed.
The SPI Isolator 6 Click Board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to 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
| Type | Isolators,SPI |
| Applications | Can be used for general SPI-bus isolation, industrial, process and building automation, programmable logic controllers, and many more |
| On-board modules | MAX22345 - four-channel digital isolator from Analog Devices |
| Key Features | Reinforced galvanic isolation for SPI communication, up to 200Mbps maximum data rate, withstands 3.75kVRMS for 60s, low power consumption, and more |
| Interface | SPI |
| Compatibility | mikroBUS |
| Click board size | M (42.9 x 25.4 mm) |
| Input Voltage | 3.3V or 5V,External |
PINOUT DIAGRAM
This table shows how the pinout of the SPI Isolator 6 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin |  |
Pin | Notes | |||
|---|---|---|---|---|---|---|---|
| NC | 1 | AN | PWM | 16 | NC | ||
| NC | 2 | RST | INT | 15 | NC | ||
| SPI Chip Select | CS | 3 | CS | RX | 14 | NC | |
| SPI Clock | SCK | 4 | SCK | TX | 13 | NC | |
| SPI Data OUT | SDO | 5 | MISO | SCL | 12 | NC | |
| SPI Data IN | SDI | 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
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
| JP1 | VCC SEL | Left | Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V |
SPI ISOLATOR 6 CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 3.3 | - | 5 | V |
| External Supply Voltage VCC_EXT | 1.7 | - | 5.5 | V |
| Data Rate | - | - | 200 | Mbps |
| Isolation Voltage (Continuously) | - | - | 784 | VRMS |
| Operating Temperature Range | -40 | +25 | +120 | °C |
Software Support
Software Support
We provide a library for the SPI Isolator 6 Click Board™ as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
The package can be downloaded/installed directly from NECTO Studio The package Manager (recommended), downloaded from our LibStock™ or found on MikroE Github account.
Library Description
This library contains API for the SPI Isolator 6 Click Board™ driver.
Key functions
-
spiisolator6_generic_writeThis function writes a desired number of data bytes by using SPI serial interface. -
spiisolator6_generic_readThis function writes and then reads a desired number of data bytes by using SPI serial interface.
Example Description
This example demonstrates the use of the SPI Isolator 6 Click Board™ by reading the device ID of the connected Accel 22 Click Board™ board.
void application_task ( void )
{
spiisolator6_get_accel22_device_id ( &spiisolator6 );
Delay_ms( 1000 );
}
The full application code, and ready to use projects can be installed directly from NECTO Studio The 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.SPIIsolator6
Additional Notes and Information
Depending on the development board you are using, you may need a USB UART Click Board™, 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 MikroElektronika compilers.
MIKROSDK
The SPI Isolator 6 Click Board™ is supported with mikroSDK - MikroElektronika 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.
Software Support
Software Support
We provide a library for the SPI Isolator 6 Click Board™ as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
The package can be downloaded/installed directly from NECTO Studio The package Manager (recommended), downloaded from our LibStock™ or found on MikroE Github account.
Library Description
This library contains API for the SPI Isolator 6 Click Board™ driver.
Key functions
-
spiisolator6_generic_writeThis function writes a desired number of data bytes by using SPI serial interface. -
spiisolator6_generic_readThis function writes and then reads a desired number of data bytes by using SPI serial interface.
Example Description
This example demonstrates the use of the SPI Isolator 6 Click Board™ by reading the device ID of the connected Accel 22 Click Board™ board.
void application_task ( void )
{
spiisolator6_get_accel22_device_id ( &spiisolator6 );
Delay_ms( 1000 );
}
The full application code, and ready to use projects can be installed directly from NECTO Studio The 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.SPIIsolator6
Additional Notes and Information
Depending on the development board you are using, you may need a USB UART Click Board™, 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 MikroElektronika compilers.
MIKROSDK
The SPI Isolator 6 Click Board™ is supported with mikroSDK - MikroElektronika 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.
Frequently Asked Questions
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