High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
14.2.6.7
Switch Fabric MAC Address Low Register (SWITCH_MAC_ADDRL)
Offset:
1F4h
Size:
32 bits
This register contains the lower 32-bits of the MAC address used by the switch for Pause frames. This
register is used in conjunction with Switch Fabric MAC Address High Register
(SWITCH_MAC_ADDRH). The contents of this register are optionally loaded from the EEPROM at
power-on through the EEPROM Loader if a programmed EEPROM is detected. The least significant
byte of this register (bits [7:0]) is loaded from address 01h of the EEPROM. The most significant byte
(bits [31:24]) is loaded from address 04h of the EEPROM. These EEPROM values are also loaded
into the Host MAC Address Low Register (HMAC_ADDRL). The Host can update the contents of this
field after the initialization process has completed.
Refer to Section 9.6, "Host MAC Address," on page 119 for details on how the EEPROM Loader loads
this register. Refer to Section 10.2.4, "EEPROM Loader," on page 149 for information on using the
EEPROM Loader.
BITS
DESCRIPTION
TYPE
DEFAULT
31:0
Physical Address[31:0]
This field contains the lower 32-bits (31:0) of the physical address of the
Switch Fabric MACs.
R/W
FF0F8000h
SMSC LAN9312
239
Revision 1.2 (04-08-08)
DATASHEET
SMSC [ SMSC CORPORATION ]
