LAN9313 Datasheet, PDF (323/398 Pages) SMSC Corporation – Three Port 10/100 Managed Ethernet Switch with MII

Three Port 10/100 Managed Ethernet Switch with MII
Datasheet
13.3.3.10 Switch Engine VLAN Read Data Register (SWE_VLAN_RD_DATA)
Register #:
180Eh
Size:
32 bits
This register is used to read the VLAN or Port VID tables.
BITS
DESCRIPTION
31:18
17:0
RESERVED
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.
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
RO
RO
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 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 (External MII)
See description for Member Port 2.
Un-Tag Port 0 (External MII)
See description for Un-Tag Port 2.
VID
These bits specify the VLAN ID associated with this VLAN
entry.
DEFAULT
0b
0b
0b
0b
0b
0b
000h
DEFAULT
-
00000h
SMSC LAN9313/LAN9313i
323
DATASHEET
Revision 1.2 (04-08-08)