5.7 EEPROM Memory

The SAMA5D27 SOM1 embeds the 24AA02E48T-I/OT, a 1Kb Serial EEPROM with pre-programmed EUI-48 MAC address.

The device is organized as one block of 128 x 8-bit memory with a 2-wire serial interface. The second block is reserved for MAC Address storage.

The 24AA02E48T-I/OT also has a page write capability for up to 8 bytes of data.

The 24AA02E48T-I/OT is available in the standard 5-lead SOT-23 package. For more information, see the product web page.

Figure 5-5. EEPROM Memory Block Diagram

Tip: The 2-Wire serial interface can be externally shared with another device. 2-Wire Data Signal (SAMA5D27 SOM1 Pad 19) and 2-Wire Clock Signal (SAMA5D27 SOM1 Pad 20) are used.

Important: If the 2-Wire serial interface is used externally, the device connected must have a different I²C address than the embedded EEPROM. For more details, refer to the device data sheet.