High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
14.5.3.19 Switch Engine Port State Register (SWE_PORT_STATE)
Register #:
1843h
Size:
32 bits
This register is used to configure the per port spanning tree state.
BITS
DESCRIPTION
TYPE
DEFAULT
31:6
5:4
RESERVED
RO
-
Port State Port 2
These bits specify the spanning tree port states for Port 2.
R/W
00b
00 = Forwarding
01 = Blocking
10 = Learning
11 = Listening
3:2
1:0
Port State Port 1
R/W
R/W
00b
00b
These bits specify the spanning tree port states for Port 1.
00 = Forwarding
01 = Blocking
10 = Learning
11 = Listening
Port State Port 0
These bits specify the spanning tree port states for Port 0(Host MAC).
00 = Forwarding
01 = Blocking
10 = Learning
11 = Listening
Note:
Typically, the Host MAC is kept in the forwarding state, since it is
not a true network port.
Revision 1.2 (04-08-08)
388
SMSC LAN9312
DATASHEET
SMSC [ SMSC CORPORATION ]
