Datasheet

 2008-2018 Microchip Technology Inc. DS20002124H-page 15
24AA02E48/24AA025E48/24AA02E64/24AA025E64
9.2 EUI-64™ Node Address
(24AAXXXE64)
The 8-byte EUI-64™ node address value of the
24AAXXXE64 is stored in array locations 0xF8 through
0xFF, as shown in Figure 9-3. The first three bytes are
the Organizationally Unique Identifier (OUI) assigned
to Microchip by the IEEE Registration Authority. The
remaining five bytes are the Extension Identifier, and
are generated by Microchip to ensure a globally
unique, 64-bit value.
FIGURE 9-3: EUI-64 NODE ADDRESS PHYSICAL MEMORY MAP EXAMPLE (24AAXXXE64)
Note: In conformance with IEEE guidelines,
Microchip will not use the values 0xFFFE
and 0xFFFF for the first two bytes of the
EUI-64 Extension Identifier. These two
values are specifically reserved to allow
applications to encapsulate EUI-48
addresses into EUI-64 addresses.
F8h FFh
24-bit Organizationally
Unique Identifier
40-bit Extension
Identifier
00h 04h A3h 12h 34h 56h
Corresponding EUI-64™ Node Address: 00-04-A3-12-34-56-78-90
Description
Data
Array
Address
78h 90h