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RTL8211E-VL-CG Datasheet(PDF) 32 Page - Realtek Semiconductor Corp.

Part No. RTL8211E-VL-CG
Description  INTEGRATED 10/100/1000M ETHERNET TRANSCEIVER
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Maker  REALTEK [Realtek Semiconductor Corp.]
Homepage  https://www.realtek.com/en/
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RTL8211E-VL-CG Datasheet(HTML) 32 Page - Realtek Semiconductor Corp.

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RTL8211E/RTL8211EG
Datasheet
Integrated 10/100/1000M Ethernet Transceiver
24
Track ID: JATR-2265-11 Rev. 1.4
7.11.1. Auto-Negotiation Priority Resolution
Upon the start of auto-negotiation, to advertise its capabilities each station transmits a 16-bit packet called
a Link Code Word (LCW), within a burst of 17 to 33 Fast Link Pulses (FLP). A device capable of
auto-negotiation transmits and receives the FLPs. The receiver must identify three identical LCWs before
the information is authenticated and used in the arbitration process. The devices decode the base LCW and
select capabilities with the highest common denominator supported by both devices.
To advertise 1000Base-T capability, both link partners, sharing the same link medium, should engage in
Next Page (1000Base-T Message Page, Unformatted Page 1, and Unformatted Page 2) exchange.
Auto-negotiation ensures that the highest priority protocol will be selected as the link speed based on the
following priorities advertised through the Link Code Word (LCW) exchange. Refer to IEEE 802.3 Clause
28 for detailed information.
1. 1000Base-T Full Duplex (highest priority)
2. 1000Base-T Half Duplex
3. 100Base-TX Full Duplex
4. 100Base-TX Half Duplex
5. 10Base-T Full Duplex
6. 10Base-T Half Duplex (lowest priority)


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