参数资料
型号: WBLXT974BHCA8
厂商: CORTINA SYSTEMS INC
元件分类: 网络接口
英文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP160
封装: ROHS COMPLIANT, PLASTIC, MS-002DD-1, HQFP-160
文件页数: 21/76页
文件大小: 1004K
代理商: WBLXT974BHCA8
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
Low
Reset
-
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
相关PDF资料
PDF描述
WBLXT9785EHC.C2V DATACOM, INTERFACE CIRCUIT, PQFP208
WBLXT9785EHC.D0-865110 DATACOM, INTERFACE CIRCUIT, PQFP208
WBLXT9785EHC.D0-865111 DATACOM, INTERFACE CIRCUIT, PQFP208
WBLXT9785EHC.D0 DATACOM, INTERFACE CIRCUIT, PQFP208
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