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RTL8211E-VL-CG Datasheet(PDF) 23 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) 23 Page - Realtek Semiconductor Corp.

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RTL8211E/RTL8211EG
Datasheet
Integrated 10/100/1000M Ethernet Transceiver
15
Track ID: JATR-2265-11 Rev. 1.4
A Wakeup Frame event occurs only when the following conditions are met:
• The destination address of the received Wakeup Frame is acceptable to the RTL8211E/RTL8211EG,
e.g., a broadcast, multicast, or unicast address to the current RTL8211E/RTL8211EG.
• The received Wakeup Frame does not contain a CRC error.
• The 16-bit CRC* of the received Wakeup Frame matches the 16-bit CRC of the sample Wakeup Frame
pattern given by the local machine’s OS. Or, the RTL8211E/RTL8211EG is configured to allow direct
packet wakeup, e.g., a broadcast, multicast, or unicast network packet.
Note: 16-bit CRC: The RTL8211E/RTL8211EG supports eight long wakeup frames (covering 128 mask
bytes from offset 0 to 127 of any incoming network packet). CRC16 polynomial = x
16 + x12 + x5 + 1.
7.5. Interrupt
Whenever there is a status change on the media detected by the RTL8211E/EG, they will drive the interrupt
pin (INTB) low to issue an interrupt event. The MAC senses the status change and accesses the registers
(Page 0, Register 19) through the MDC/MDIO interface in response.
Once these status registers (Page 0, Register 19) have been read by the MAC through the MDC/MDIO, the
INTB is de-asserted. The RTL8211E/EG interrupt function removes the need for continuous polling
through the MDC/MDIO management interface.
7.6. MDI Interface
This interface consists of four signal pairs; MDI0, MDI1, MDI2, and MDI3. Each signal pair consists of
two bi-directional pins that can transmit and receive at the same time. The MDI interface has internal
termination resistors to reduce BOM cost and PCB complexity. For 1000Base-T, all four pairs are used in
both directions at the same time. For 10/100 links and during auto-negotiation, only pairs A and B are used.


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