7.1 EEPROM

The SAM9X60D1G-I/LZB System-On-Module embeds the 24AA025E48T-I/OT, a 1-Kbit Serial EEPROM with a 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 24AA025E48T-I/OT also has a page write capability for up to 16 bytes of data. The 24AA025E48T-I/OT is available in the standard 5-lead SOT-23 package.

For more information about the 24AA025E48 EEPROM, see Reference Documents.

Figure 7-1. EEPROM Memory Block Diagram

Tip: The 2-wire serial interface can be externally shared with another device. A 2-wire data signal (pad 21) and a 2-wire clock signal (pad 22) are used.

Important: If the 2-wire serial interface is used externally, the connected device must have an I²C address different from the embedded EEPROM address. For more details, refer to the device data sheet and to the System-On-Module schematic.