LAN9312 datasheet(377/458 Pages) SMSC

377 / 458 page

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

Datasheet

SMSC LAN9312

377

Revision 1.2 (04-08-08)

DATASHEET

14.5.3.9

Switch Engine VLAN Write Data Register (SWE_VLAN_WR_DATA)

This register is used write the VLAN or Port VID tables.

180Ch

Size:

32 bits

BITS

DESCRIPTION

TYPE

DEFAULT

31:18

RESERVED

17:0

Port Default VID and Priority

When the port VID table is selected (PVIDnVLAN=1 of the Switch Engine

VLAN Command Register (SWE_VLAN_CMD)), bits 11:0 of this field specify

the default VID for the port and bits 14:12 specify the default priority. All

other bits of this field are reserved. These bits are used when a packet is

received without a VLAN tag or with a NULL VLAN ID. By default, the VID

and priority for all three ports is 0.

Note:

Values of 0 and FFFh should not be used since they are special

VLAN IDs per the IEEE 802.3Q specification.

VLAN Data

When the VLAN table is selected (PVIDnVLAN=0 of the Switch Engine

VLAN Command Register (SWE_VLAN_CMD)), the bits form the VLAN

table entry as follows:

R/W

BITS

DESCRIPTION

DEFAULT

Member Port 2

Indicates the configuration of Port 2 for this VLAN entry.

1 = Member

- Packets with a VID that matches this entry

are allowed on ingress. The port is a member of the

broadcast domain on egress.

0 = Not a Member

- Packets with a VID that matches this

entry are filtered on ingress unless the Admit Non Member

bit in the Switch Engine Admit Non Member Register

(SWE_ADMT_N_MEMBER) is set for this port. The port is

not a member of the broadcast domain on egress.

Un-Tag Port 2

When this bit is set, packets received on Port 2 with a VID

that matches this entry will have their tag removed when re-

transmitted by egress ports that are designated as Hybrid

ports via the Buffer Manager Egress Port Type Register

(BM_EGRSS_PORT_TYPE).

Member Port 1

See description for Member Port 2.

Un-Tag Port 1

See description for Un-Tag Port 2.

Member Port 0 (Host MAC)

See description for Member Port 2.

Un-Tag Port 0 (Host MAC)

See description for Un-Tag Port 2.

11:0

VID

These bits specify the VLAN ID associated with this VLAN

entry.

To disable a VLAN entry, a value of 0 should be used.

Note:

A value of 0 is considered a NULL VLAN and

should not normally be used other than to

disable a VLAN entry.

Note:

A value of 3FFh is considered reserved by IEEE

802.1Q and should not be used.

000h

LAN9312 Datasheet(PDF) 377 Page - SMSC Corporation

LAN9312 Datasheet(HTML) 377 Page - SMSC Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL