參數資料
型號: L80227
廠商: LSI CORP
元件分類: 網絡接口
英文描述: 10BASE-T/100BASE-TX Ethernet Physical Layer Device (PHY)(10BASE-T/100BASE-TX 以太網物理層處理器)
中文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP64
封裝: LQFP-64
文件頁數: 46/158頁
文件大?。?/td> 1084K
代理商: L80227
Draft 6/5/00
2-26
Functional Description
Copyright 1999 by LSI Logic Corporation. All rights reserved.
the template specified in IEEE 802.3 and shown in
Figure 2.6
. A timing
diagram contrasting NLPs and FLPs is shown in
Figure 2.7
.
Figure 2.7
NLP vs FLP Link Pulse
To enable AutoNegotiation for a channel, set the AutoNegotiation Enable
(ANEG_EN) bit in the MI serial port Control register. If AutoNegotiation
is enabled, any of the following events initiates the AutoNegotiation
algorithm for the channel:
Power up
Device reset
The channel enters the Link Fail state
The AutoNegotiation Enable (ANEG_EN) bit in the MI serial port
Control register for that port is cleared, then set
The AutoNegotiation Reset (ANEG_RST) bit in the MI serial port
Control register is set
Once a negotiation has been initiated, the device first determines if the
remote device has AutoNegotiation capability. If the remote device is not
AutoNegotiation capable and is just transmitting either 10BASE-T or
100BASE-TX signals, the device senses it and places itself in the same
mode as the remote device. If the device detects FLPs from the remote
device, the remote device is determined to have AutoNegotiation
capability, and the device then uses the value from the PHY
AutoNegotiation Advertisement for that port to advertise its capabilities to
the remote device. The device negotiation algorithm matches its
Normal Link Pulse (NLP)
TX_DI
TX_DI
Fast Link Pulse (FLP)
Clock Clock Clock Clock Clock Clock Clock
Data Data Data Data Data Data
D0
D1
D2
D3
D14
D15
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參數描述
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