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LAN9250 데이터시트(PDF) 141 Page - Microchip Technology

부품명 LAN9250
상세설명  Integrated Ethernet PHY with HP Auto-MDIX
PDF  421 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN9250 데이터시트(HTML) 141 Page - Microchip Technology

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 2015 Microchip Technology Inc.
DS00001913A-page 141
LAN9250
field, the controller will recognize the packet as a VLAN-tagged packet, allowing the packet to be received and pro-
cessed by the host software. If both VLAN1 and VLAN2 tag Identifiers are used, each should be unique. If both are set
to the same value, VLAN1 is given higher precedence and the maximum legal frame length is set to 1522.
FIGURE 11-1:
VLAN FRAME
Preamble
7 Bytes
SOF
1 Byte
Dest. Addr.
6 Bytes
Source Addr.
6 Bytes
Type
2 Bytes
Data
46-1500 Bytes
FCS
4 Bytes
Standard Ethernet Frame (1518 Bytes)
Preamble
7 Bytes
SOF
1 Byte
Dest. Addr.
6 Bytes
Source Addr.
6 Bytes
Type
2 Bytes
Data
46-1500 Bytes
FCS
4 Bytes
Ethernet Frame with VLAN TAG (1522 Bytes)
TPID
2 Bytes
Type
2 Bytes
TPID
2 Bytes
VLAN ID
12 Bits
User Priority
3 Bits
CFI
1 Bit
Tag Control Information
(TCI)
Defines the VLAN to
which the frame belongs
Canonical Address Format Indicator
Indicates the frame’s priority
Tag Protocol ID: \x81-00



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