26
22 Sept 2016
v1.1
2.14 MAC ID – EEPROM
MAC ID I2C ADDR:
0xA2
The SOM does not contain a MAC ID EEPROM so the carrier has one placed for design
flexibility. A 2Kb MAC ID EEPROM with EUI-48 Node Identity (Microchip PN: 24AA025E48) is
used to store the MAC ID for the SOM’s Ethernet PHY. The device allows a user ID to be
written at location 0x00 to 0x79. The devices’ remaining memory is programmed at the factory
with a globally unique node address stored in the upper half of the array. This address (0x80 to
0xFF) is permanently write protected. The I2C address is configured via JT5 and JT6. The
default address is
0xA2.
Figure 13 – MAC ID – I2C EEPROM