I2C Isolator 2 click

I2C Isolator 2 click provides I2C lines and power isolation for slave devices. It carries the ADM3260 dual I2C isolator with an integrated DC-to-DC converter, from Analog Devices. I2C Isolator 2 click is designed to run on either 3.3V or 5V power supply. The click communicates with the target microcontroller over an I2C interface with additional functionality provided by the PWM pin on the mikroBUS™ line.

ADM3260 features

The ADM3260 is a hot-swappable digital and power isolator with two nonlatching, bidirectional communication channels, supporting a complete isolated I2C interface, and an integrated isolated dc-to-dc converter, supporting up to 150 mW of isolated power conversion.

The bidirectional I2C channels eliminate the need for splitting I2C signals into separate transmit and receive signals for use with standalone optocouplers. 

How it works

The screw terminal on the board can be connected to I2C and power connections of an I2C slave device.

Specifications

Pinout diagram

This table shows how the pinout on I2C Isolator 2 click 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	PDIS	Power disable
	NC	2	RST	INT	15	NC
	NC	3	CS	TX	14	NC
	NC	4	SCK	RX	13	NC
	NC	5	MISO	SCL	12	SCL	I2C Clock
	NC	6	MOSI	SDA	11	SDA	I2C Data
Power supply	+3.3V	7	3.3V	5V	10	+5V	Power supply
Ground	GND	8	GND	GND	9	GND	Ground

Jumpers and Settings

Buttons and LEDs

Software Support

We provide a library for the I2C Isolator 2 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 I2C Isolator 2 Click driver.

Key functions

• i2cisolator2_write This function writes a desired data to I2C bus.

• i2cisolator2_read This function reads a desired number of data bytes from I2C bus.

• i2cisolator2_set_slave_address This function sets the slave address.

Example Description

This example showcases how to initialize, configure and use the I2C Isolator 2 Click. The Click provides I2C lines and power isolation for slave devices. In order for this example to work, you need the EEPROM 3 Click.

 void application_task ( void ) 
 { 
     uint8_t read_buf[ 100 ] = { 0 }; 
     if ( I2CISOLATOR2_OK == eeprom3_write_page ( EEPROM3_MEMORY_ADDRESS, EEPROM3_DEMO_TEXT,  
                                                  strlen( EEPROM3_DEMO_TEXT ) ) ) 
     { 
         log_printf( &logger, " Demo text message is written to EEPROM 3 click!rn" ); 
     } 
     Delay_ms ( 1000 ); 

     if ( I2CISOLATOR2_OK == eeprom3_read_page ( EEPROM3_MEMORY_ADDRESS, read_buf,  
                                                 strlen( EEPROM3_DEMO_TEXT ) ) ) 
     { 
         read_buf[ strlen( EEPROM3_DEMO_TEXT ) ] = 0; 
         log_printf( &logger, " Read data: "%s"rnn", read_buf ); 
     } 
     Delay_ms ( 1000 ); 
 }

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.I2CIsolator2

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.