5220-DS02-R datasheet(40/90 Pages) BOARDCOM

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BCM5220

Preliminary Data Sheet

04/20/04

Broa d c om Co rp o r a t i o n

Page 28

MII Status Register

Document

5220-DS04-405-R

PHY IDENTIFIER REGISTERS

The physical identifier registers bit descriptions are shown in Table 11.

Broadcom Corporation has been issued an Organizationally Unique Identifier (OUI) by the IEEE. It is a 24-bit number, 00-

10-18, expressed as hex values. That number, along with the Broadcom Model Number for the BCM5220 part, 1Eh, and

Broadcom Revision number, 0h for the A0 is placed into two MII registers. The translation from OUI, Model Number and

Revision Number to PHY Identifier register occurs as follows:

•

PHYID HIGH [15:0] = OUI[21:6]

•

PHY LOW [15:0] = OUI[5:0] + MODEL[5:0] + REV[3:0]

The 2 most significant bits of the OUI are not represented (OUI[23:22]).

Table 11 shows the result of concatenating these values to form MII Identifier registers PHYID HIGH and PHYID LOW.

Table 11: PHY Identifier Registers (Addresses 00010 and 00011b, 02 and 03b, 02 and 03h)

Bit

Name

R/W

Description

Value

15:0

MII Address 02h

PHYID HIGH

0040h

15:0

MII Address 03h

PHYID LOW

61E0h

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