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250 Software Developer’s Manual
Register Descriptions
13.4.7.1.3 PHY Identifier Register (LSB)
PID (02d; R)
13.4.7.1.4 Extended PHY Identifier Register (MSB)
EPID (03d; R)
Table 13-18. PHY Identifier Bit Description
Field Bit(s) Description Mode HW Rst SW Rst
Organizationally
Unique Identifier Bit
18:3
1
1. PHY ID number for the 82541xx and 82547GI/EI only.
15:0
0000_0001_0100_0001b
OUI is 005043h.
The PHY identifier composed of bits 3
through 18 of the OUI (Organizationally
Unique Identifier)
2
2. 82541xx and 82547GI/EI only.
RO
Always 0141h
Always 02A8h
2
Table 13-19. Extended PHY Identifier Bit Description
Field Bit(s) Description Mode HW Rst SW Rst
Revision Number 3:0
Contains the current revision number.
4 bits containing the manufacturer’s
revision number.
1
1. 82541xx and 82547GI/EI only.
RO
Always static
00h
1
Model Number 9:4
000010b = 10/100/1000 Copper PHY.
82544GC/EI only:
000011b = 10/100/1000 Copper PHY.
6 bits containing the manufacturer’s part
number
1
RO
Always 000010b
82544GC/EI only:
Always 000011b
Always 111000b
1
Organizationally
Unique Identifier Bit
19:24
(PHY ID Number for
the 82541xx and
82547GI/EI)
15:10
000011b.
The PHY identifier composed of bits 19
through 24 of the OUI
1
RO
Always 000011b
0h
1