LAN9303 Datasheet, PDF (282/366 Pages) SMSC Corporation – Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII

Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII
Datasheet
BITS
DESCRIPTION
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. The default VID is
also used when the 802.1Q VLAN Disable bit is set. The default priority is
also used when no other priority choice is selected. By default, the VID for
all three ports is 1 and the 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:
TYPE
R/W
BITS
17
16
15
14
13
12
11:0
DESCRIPTION
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 with a VID that matches this
entry will have their tag removed when re-transmitted on
Port 2 when it is designated as a Hybrid port 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
See description for Member Port 2.
Un-Tag Port 0
See description for Un-Tag Port 2.
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.
DEFAULT
0b
0b
0b
0b
0b
0b
000h
DEFAULT
0b
Revision 1.3 (08-27-09)
282
DATASHEET
SMSC LAN9303/LAN9303i