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LAN89730 bảng dữ liệu(PDF) 172 Page - Microchip Technology

tên linh kiện LAN89730
Giải thích chi tiết về linh kiện  Implements Reduced Power Operating Modes
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LAN89730 bảng dữ liệu(HTML) 172 Page - Microchip Technology

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LAN89730
DS60001348A-page 172
 2013-2015 Microchip Technology Inc.
6.4.9
VLAN1 TAG REGISTER (VLAN1)
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.
The RXCOE also uses this register to determine the protocol value to use to indicate the existence of a VLAN tag. When
using the RXCOE, this value may only be changed if the RX path is disabled. If it is desired to change this value during
run time, it is safe to do so only after the MAC is disabled and the TLI is empty.
Address:
120h
Size:
32 bits
Bits
Description
Type
Default
31:16
RESERVED
RO
-
15:0
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.
R/W
FFFFh



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