- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄369886 > LXT970ATC Telecomm/Datacomm PDF資料下載
參數(shù)資料
| 型號： | LXT970ATC |
| 元件分類： | 通信、網(wǎng)絡(luò)模塊及開發(fā)工具 |
| 英文描述： | Telecomm/Datacomm |
| 中文描述： | 電信/數(shù)據(jù)通信 |
| 文件頁數(shù)： | 39/68頁 |
| 文件大?。?/td> | 1177K |
| 代理商： | LXT970ATC |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁當(dāng)前第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁
Low-Power Octal PHY
—
LXT9784
Datasheet
39
cases that the cable type does not match the two ends MAUs configurations, replacement of the
cable is required. With the MDI/MDI-X feature enabled, switching is performed automatically by
the LXT9784, to adjust the MAU to the cable type.
This advanced feature enables auto-correction of a specific wiring problem of incorrect cabling
with respect to crossed-over versus straight-through cables. The LXT9784 PHY can identify the
cable connection type and adjust its MDI port to the cable by switching between the TPO and TPI
pairs. The auto switching is done prior to the auto-negotiation algorithm.
Table 14
shows the standard DTE straight-through RJ-45 port configuration, with the transmit pair
on contacts 1 and 2, and the receive pair on contacts 3 and 6.
Table 15
shows the MAU
configuration of a crossed-over RJ-45 port.
2.5.1
MDI/MDI-X Auto Switching Activation
The external MDI-X input, sampled during reset, enables or disables auto-switching. When this
input is externally pulled up, or left unconnected, auto-switching is enabled. When MDI-X is
externally pulled down, auto switching is disabled. In the case that auto-switching was disabled
during reset, after reset the MDI-X pin is used to configure the connection type (straight-through or
crossed-over). A
“
1
”
forces a crossed-over connection, a
“
0
”
forces a straight-through connection.
2.5.2
MDI/MDI-X Algorithm
In the case that auto-switching was enabled during reset, the PHY attempts to detect link activity in
a given configuration (MDI or MDI-X) for a duration of 80 - 100 ms. If no link activity is detected
during this slot time, the PHY waits a random amount of time greater then 80 ms, and switches the
MDI pairs to the other configuration.
Table 14. Straight-through Pin Assignments
Contact
MDI Signal
1
TDP
_n
2
TDN
_n
3
RDP
_n
4
Not used
5
Not used
6
RDN
_n
7
Not used
8
Not used
Table 15. Crossed-over Pin Assignments
Contact
MDI Signal
1
RDP
_n
2
RDN
_n
3
TDP
_n
4
Not used
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LXT971ABC | LAN TRANSCEIVER|SINGLE|CMOS|BGA|64PIN|PLASTIC |
| LXT971ABE | LAN TRANSCEIVER|SINGLE|CMOS|BGA|64PIN|PLASTIC |
| LXT971ALC | LAN TRANSCEIVER|SINGLE|CMOS|QFP|64PIN|PLASTIC |
| LXT971ALE | LAN TRANSCEIVER|SINGLE|CMOS|QFP|64PIN|PLASTIC |
| LXT974QC | LAN Transceiver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LXT970QC | 制造商:LEVEL ONE 功能描述: 制造商:Level One 功能描述:LAN Transceiver, Single, 64 Pin, Plastic, QFP 制造商:Level One Communications 功能描述:LAN Transceiver, Single, 64 Pin, Plastic, QFP |
| LXT971A | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:3.3V Dual-Speed Fast Ethernet PHY Transceiver |
| LXT971ABC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN TRANSCEIVER|SINGLE|CMOS|BGA|64PIN|PLASTIC |
| LXT971ABE | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:3.3V Dual-Speed Fast Ethernet PHY Transceiver |
| LXT971ALC | 制造商:Intel 功能描述:LAN Transceiver, Single, 64 Pin, Plastic, QFP 制造商:Intellon Corporation 功能描述:LAN Transceiver, Single, 64 Pin, Plastic, QFP 制造商:Level One 功能描述:LAN Transceiver, Single, 64 Pin, Plastic, QFP |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。