參數(shù)資料
型號(hào)： LXT974
廠商： Intel Corp.
英文描述： Fast Ethernet 10/100 Quad Transceivers
中文描述： 四10/100快速以太網(wǎng)收發(fā)器
文件頁數(shù)： 28/74頁
文件大?。?/td> 1089K
代理商： LXT974
LXT974/LXT975
—
Fast Ethernet 10/100 Quad Transceivers
28
Datasheet
2.3.3
Link Configuration
When the LXT974/975 is first powered on, reset, or encounters a link failure state, it must
determine the line speed and operating conditions to use for the network link.
The LXT974/975 first checks the Hardware Control Interface pins and MDIO registers. Using
these mechanisms, the user can command the LXT974/975 to do one of the following:
Force network link to 100FX (Fiber).
Force network link operation to:
100TX, Full-Duplex
100TX, Half-Duplex
10BASE-T, Full-Duplex
10BASE-T, Half-Duplex
Allow auto-negotiation/parallel-detection. The Hardware Control Interface pins are used to set
the state of the MDIO advertisement registers.
When forcing the network link, the LXT974/975 immediately begins operating the network
interface as commanded. When auto-negotiation is enabled, the auto-negotiation / parallel-
detection operation begins.
Table 18. Mode Control Settings
Mode
MDDIS
Pin 100
RESET
Pin 109
PWR
DWN
Pin 102
MDIO Control
Low
High
Low
Manual Control
High
High
Low
Reset
-
Low
Low
Power Down
-
-
High
Figure 11. Hardware Interface Mode Selection
Power-up or Reset
Check Value
MDDIS
High
Low
MDIO Control
Mode
Exit
Manual Control
Mode
Disable MDIO Writes
Read H/W Control
Interface
Initialize MDIO Registers
Read H/W Control
Interface
Pass Control to MDIO
Interface
Update MDIO Registers
相關(guān)PDF資料
PDF描述
LXT974A Fast Ethernet 10/100 Quad Transceivers
LXT974AHC Fast Ethernet 10/100 Quad Transceivers
LXT974B Fast Ethernet 10/100 Quad Transceivers
LXT974BHC Fast Ethernet 10/100 Quad Transceivers
LXT975 Fast Ethernet 10/100 Quad Transceivers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LXT974A 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Fast Ethernet 10/100 Quad Transceivers
LXT974AHC 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Fast Ethernet 10/100 Quad Transceivers
LXT974B 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Fast Ethernet 10/100 Quad Transceivers
LXT974BHC 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Fast Ethernet 10/100 Quad Transceivers
LXT974QC 制造商:LEVELONE 功能描述:
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