Datasheet

11AA02E48/11AA02E64
DS20002122B-page 18  2008-2013 Microchip Technology Inc.
7.3 EUI-64™ Node Address
(11AA02E64)
The 8-byte EUI-64™ node address value of the
11AA02E64 is stored in array locations 0xF8 through
0xFF, as shown in Figure 7-3. The first three bytes are
the Organizationally Unique Identifier (OUI) assigned
to Microchip by the IEEE Registration Authority. Cur-
rently, Microchip’s OUIs are 0x0004A3 and 0x001EC0,
though this will change as addresses are exhausted.
The remaining five bytes are the Extension Identifier,
and are generated by Microchip to ensure a globally-
unique, 64-bit value.
FIGURE 7-3: EUI-64 NODE ADDRESS PHYSICAL MEMORY MAP EXAMPLE (11AA02E64)
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