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.
Specifications
| Type |
EEPROM |
| 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).
| Notes | Pin |  | Pin | Notes |
|---|
|
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
| Designator | Name | Default Position | Default Option | Description |
|---|
| 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 |
Programming
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 }
