LAN9353 Datasheet, PDF (301/523 Pages) Microchip Technology – Interfaces at up to 200Mbps via Turbo MII

LAN9353
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, bits 14:12 specify the default priority for packets
with a non-broadcast destination MAC address and bits 17:15 specify the
default priority for packets with a broadcast destination MAC address. 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 priorities 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:
Bits
Description
Default
17
Member Port 2
0b
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.
16
Un-Tag Port 2
0b
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).
15
Member Port 1
0b
See description for Member Port 2.
14
Un-Tag Port 1
0b
See description for Un-Tag Port 2.
13
Member Port 0
0b
See description for Member Port 2.
12
Un-Tag Port 0
0b
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
Type
RO
Default
00
0000
0000
0000
0000b
 2015 Microchip Technology Inc.
DS00001925A-page 301