Artesyn COMX-P40x0 ENP2 Installation and Use (January 2015) - Manual (Page 112)

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COMX-P40x0 ENP2 Installation and Use (6806800R95C) 112
7.15.1 ID EEPROM
An I2C EEPROM AT24C02 (U30) is used as the ID EEPROM, located on I2C<1>. The COMX-
P40x0 ENP2 module uses ID EEPROM to store the board’s serial number, number of network
ports, MAC addresses, errata level, manufacturing date and other information. Boot up
message in the U-Boot will be: "EEPROM: NXID v0".
U-Boot provides several "mac" utilities to display and program the data in ID EEPROM.
The following are usage examples:
 mac id
 mac num E017D99
 mac errata 0
 mac date 101021120000
 mac ports 1
 mac 0 00:80:42:05:49:d4
 mac save
mac [read|save|id|num|errata|date|ports|0|1|2|3|4|5|6|7]
mac read Shows content of EEPROM
mac save Saves to the EEPROM
mac id Programs system id
mac num Programs system serial number
mac errata Programs errata data
mac date Programs date
mac ports Programs the number of ports
mac X Programs the MAC address for port X [X=0...7]