LAN9303 Datasheet, PDF (174/366 Pages) SMSC Corporation – Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII

13.2.6.3
Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII
Datasheet
Virtual PHY Identification MSB Register (VPHY_ID_MSB)
Offset:
1C8h
Index (decimal): 2
Size:
32 bits
This read/write register contains the MSB of the Virtual PHY Organizationally Unique Identifier (OUI).
The LSB of the Virtual PHY OUI is contained in the Virtual PHY Identification LSB Register
(VPHY_ID_LSB).
BITS
DESCRIPTION
31:16
15:0
RESERVED
(See Note 13.25)
PHY ID
This field contains the MSB of the Virtual PHY OUI (Note 13.26).
TYPE
RO
R/W
DEFAULT
-
0000h
Note 13.25 The reserved bits 31-16 are used to pad the register to 32-bits so that each register is on
a DWORD boundary. When accessed serially (through the MII management protocol), the
register is 16-bits wide.
Note 13.26 IEEE allows a value of zero in each of the 32-bits of the PHY Identifier.
Revision 1.3 (08-27-09)
174
DATASHEET
SMSC LAN9303/LAN9303i