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參數(shù)資料
| 型號： | WJLXT972MLC.A4SE001 |
| 廠商： | CORTINA SYSTEMS INC |
| 元件分類： | 網(wǎng)絡(luò)接口 |
| 英文描述： | DATACOM, ETHERNET TRANSCEIVER, PQFP48 |
| 封裝： | LEAD FREE, LQFP-48 |
| 文件頁數(shù)： | 30/94頁 |
| 文件大?。?/td> | 1235K |
| 代理商： | WJLXT972MLC.A4SE001 |
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Intel
LXT972M Single-Port 10/100 Mbps PHY Transceiver
36
Document Number: 302875-004
Revision Date: February 18, 2005
5.5
Establishing Link
Figure 7 shows an overview of link establishment for the LXT972M Transceiver.
Note:
When a link is established by parallel detection, the LXT972M Transceiver sets the duplex mode to
half-duplex, as defined by the IEEE 802.3 standard.
5.5.1
Auto-Negotiation
If not configured for forced operation, the LXT972M Transceiver attempts to auto-negotiate with
its link partner by sending Fast Link Pulse (FLP) bursts. Each burst consists of up to 33 link pulses
spaced 62.5
s apart. Odd link pulses (clock pulses) are always present. Even link pulses (data
pulses) may be absent or present to indicate a ‘0’ or a ‘1’. Each FLP burst exchanges 16 bits of
data, which are referred to as a “l(fā)ink code word”. All devices that support auto-negotiation must
implement the “Base Page” defined by the IEEE 802.3 standard (Registers 4 and 5).
The LXT972M Transceiver also supports the optional “Next Page” function as listed in Table 48,
5.5.1.1
Base Page Exchange
By exchanging Base Pages, the LXT972M Transceiver and its link partner communicate their
capabilities to each other. Both sides must receive at least three consecutive identical base pages for
negotiation to continue. Each side identifies the highest common capabilities that both sides
support, and each side configures itself accordingly.
Figure 7. Link Establishment Overview)
Check Value
0.12
Start
Done
Enable
Auto-Neg/Parallel Detection
Go To Forced
Settings
Attempt Auto-
Negotiation
Listen for 10T
Link Pulses
Listen for 100TX
Idle Symbols
Link Up?
NO
YES
Power-Up, Reset,
or Link Failure
Disable
Auto-Negotiation
0.12 = 0
0.12 = 1
B3496-01
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| WJLXT972MLC.A4SE000 | DATACOM, ETHERNET TRANSCEIVER, PQFP48 |
| WJLXT972MLC.A4SE001 | DATACOM, ETHERNET TRANSCEIVER, PQFP48 |
| WJLXT972MLC.A4SE000 | DATACOM, ETHERNET TRANSCEIVER, PQFP48 |
| WJLXT972MLC.A4 | DATACOM, ETHERNET TRANSCEIVER, PQFP48 |
| WJLXT972MLC.A4 | DATACOM, ETHERNET TRANSCEIVER, PQFP48 |
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