LAN9221_12 Datasheet, PDF (114/151 Pages) SMSC Corporation – High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O

5.4.9
High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O
Datasheet
VLAN1—VLAN1 Tag Register
Offset:
Default Value:
9
00000000h
Attribute:
Size:
R/W
32 bits
This register contains the VLAN tag field to identify VLAN1 frames. For VLAN frames the legal frame
length is increased from 1518 bytes to 1522 bytes.
BITS
31-16
15-0
DESCRIPTION
Reserved
VLAN1 Tag Identifier (VTI1). This contains the VLAN Tag field to identify the VLAN1 frames. This
field is compared with the 13th and 14th bytes of the incoming frames for VLAN1 frame detection.
If used, this register must be set to 0x8100.
5.4.10 VLAN2—VLAN2 Tag Register
Offset:
Default Value:
A
00000000h
Attribute:
Size:
R/W
32 bits
This register contains the VLAN tag field to identify VLAN2 frames. For VLAN frames the legal frame
length is increased from 1518 bytes to 1522 bytes.
BITS
31-16
15-0
DESCRIPTION
Reserved
VLAN2 Tag Identifier (VTI2). This contains the VLAN Tag field to identify the VLAN2 frames. This
field is compared with the 13th and 14th bytes of the incoming frames for VLAN2 frame detection.If
used, this register must be set to 0x8100.
Revision 2.9 (03-01-12)
114
DATASHEET
SMSC LAN9221/LAN9221i