AX88179
USB 3.0 to 10/100/1000M Gigabit Ethernet Controller
Note that to send the packet with VLANID Tag bytes; the software should append VLAN Tag bytes in the transmitted
packets.
802.1Q
VLAN tagging
7 Bytes
1 Byte
SFD
6 Bytes
6 Bytes
2 B 2 B
2 B
L/T
46-1500 Bytes
Data
4 Bytes
FCS
Destination
Address
Source
Address
Layer 2
Preamble
8100 TCI
Pad
Frame (64-1518 Bytes)
VLAN (64-1522 Bytes)
3 bits
1 bit
CFI
12 bits
VLAN ID
Priority
Figure 8
: 802.1q VLAN Packet Format
6.2.2.17 VLAN Control Register (VCR, 2Ah~2Dh, Read)
Bit7
Bit6
Bit5
Bit4
Bit3
VID1 [7:0]
Bit2
VID1 [11:8]
VID2 [11:8]
Bit1
Bit0
Reserved
VSO
VFE
VID2 [7:0]
Reserved
AA [7:0] = {VID1 [7:0]}.
BB [7:0] = {Reserved, VSO, VFE, VID1 [11:8]}.
CC [7:0] = {VID2 [7:0]}.
DD [7:0] = {Reserved, VID2 [11:8]}.
Their descriptions are same as Section 6.2.2.16.
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Copyright © 2011-2012 ASIX Electronics Corporation. All rights reserved.
ASIX [ ASIX ELECTRONICS CORPORATION ]
