MAC Address click

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  • MIKROE-2733
  • MIKROE-2733
MAC Address click  provides a unique node address for your application. It also has 1Kbit...more
Product information "MAC Address click"

MAC Address click provides a unique node address for your application. It also has 1Kbit of writable EEPROM memory. MAC Address click carries the 24AA025E64 2K I2C Serial EEPROM with EUI-64™ node identity. The click is designed to run on either 3.3V or 5V power supply. MAC Address click communicates with the target microcontroller over I2C interface.

24AA025E64 features

The Microchip Technology Inc. 24AA025E64 is a 2Kb Serial EEPROM with a pre-programmed IEEE EUI-64 MAC Address. The device is organized as two blocks of 128 x 8-bit memory with a 2-wire serial interface. Low voltage design permits operation down to 1.7V, with maximum standby and active currents of only 1 uA and 1 mA, respectively. The 24AA025E64 also has a page write capability for up to sixteen bytes of data.


On-board modules 24AA025E64 2K I2C Serial EEPROMs with EUI-64™ node identity from Microchip
Key Features Pre-programmed globally unique, 64-bit node address; more than 1 Million erase/write cycles
Key Benefits 1Kbit of writable EEPROM memory
Interface I2C
Input Voltage 3.3V or 5V
Click board size S (28.6 x 25.4 mm)

Pinout diagram

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

NotesPinMikrobus logo.pngPinNotes
  NC 1 AN PWM 16 NC  
  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

DesignatorNameDefault PositionDefault OptionDescription
JP2 ADD SEL Down 0 I2C slave address A0 (LSB) bit selection 0/1, down position 0, upper position 1.
JP3 ADD SEL Down 0 I2C slave address A1 bit selection 0/1, down position 0, upper position 1.
PWR SEL PWR SEL Left 3.3V Power Supply Voltage Selection 3V3/5V, left position 3V3, right position 5V


Code examples for MAC Address click, written for MikroElektronika hardware and compilers are available on Libstock.

Code snippet

The following code reads one byte from EEPROM and transmits data to UART.

01 if( !MACADDRESS_readByte( loop, &read ) )
02 {
03     LOG( "rn Byte value [ " );
04     ByteToHex( read, txt );
05     Ltrim( txt );
06     LOG( txt );
07     LOG( " ] succeessfully read from [ " );
08     ByteToHex( loop, txt );
09     Ltrim( txt );
10     LOG( txt );
11     LOG( " ] address" );
12 }
13 else
14 {
15     LOG( "rn Read Byte Error" );
16 }
17 }


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