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參數資料
| 型號： | DJIXF972MTCA4 |
| 廠商： | Intel Corp. |
| 英文描述： | Single-Port 10/100 Mbps PHY Transceiver |
| 中文描述： | 單端口10/100 Mbps的物理層收發器 |
| 文件頁數： | 34/92頁 |
| 文件大小： | 666K |
| 代理商： | DJIXF972MTCA4 |
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Intel
LXT972M Single-Port 10/100 Mbps PHY Transceiver
34
Datasheet
Document Number: 302875-005
Revision Date: 27-Oct-2005
5.5
Establishing Link
Figure 6
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
μ
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 “link 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,
“Auto-Negotiation Next Page Transmit Register - Address 7, Hex 7” on page 82
and
Table 49,
“Auto-Negotiation Link Partner Next Page Receive Register - Address 8, Hex 8” on page 82
.
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 6. 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
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相關代理商/技術參數 |
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| DJIXFEAD0SE001 | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Advanced 8-Port 10/100 Mbps PHY Transceivers |
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