LAN9312 datasheet(388/458 Pages) SMSC

Part #	LAN9312

Description	High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

PDF	458 Pages

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Manufacturer	SMSC [SMSC Corporation]

Direct Link	http://www.smsc.com

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High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

Datasheet

Revision 1.2 (04-08-08)

388

SMSC LAN9312

DATASHEET

14.5.3.19

Switch Engine Port State Register (SWE_PORT_STATE)

This register is used to configure the per port spanning tree state.

1843h

Size:

32 bits

BITS

DESCRIPTION

TYPE

DEFAULT

31:6

RESERVED

5:4

Port State Port 2

These bits specify the spanning tree port states for Port 2.

00 = Forwarding

01 = Blocking

10 = Learning

11 = Listening

R/W

00b

3:2

Port State Port 1

These bits specify the spanning tree port states for Port 1.

00 = Forwarding

01 = Blocking

10 = Learning

11 = Listening

R/W

00b

1:0

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.

R/W

00b

LAN9312 Datasheet(PDF) 388 Page - SMSC Corporation

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