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參數(shù)資料
| 型號： | 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)： | 25/74頁 |
| 文件大?。?/td> | 1089K |
| 代理商： | LXT974 |
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Fast Ethernet 10/100 Quad Transceivers
—
LXT974/LXT975
Datasheet
25
MII Interrupts
The LXT974/975 provides interrupt signals in two ways. The MDIO interrupt reflects the interrupt
status of each port addressed by the read. Details are shown in
Figure 10
.
Setting bit 17.1 = 1 on all four ports, enables global interrupts using the MDINT pin. An active
Low on this pin indicates a status change on the LXT974/975. Interrupts may be caused by:
Link status change
Auto-negotiation complete
Full-duplex status change
Jabber detect
2.2.3
Hardware Control Interface
The Hardware Control Interface is used to configure operating characteristics of the LXT974/975.
When MDDIS is Low, this interface provides initial values for the MDIO registers, and then
passes control to the MDIO Interface. When MDDIS is High, this interface provides continuous
control over the LXT974/975.
Figure 8. Management Interface - Read Frame Structure
Figure 9. Management Interface - Write Frame Structure
MDC
MDIO
(Read)
32 "1"s
0
1
1
0
Preamble
SFD
Op Code
PHY Address
Turn
Z
0
A4
A3
A0
R4
R3
R0
Register Address
D15
D14
D1
Data
Idle
Write
Read
D15
D14
D1
D0
Idle
MDC
MDIO
(Write)
32 "1"s
0
1
0
1
Preamble
SFD
Op Code
PHY Address
Turn
Around
1
0
A4
A3
A0
R4
R3
R0
Register Address
D15
D14
D1
D0
Data
Idle
Idle
Write
Figure 10. MDIO Interrupt Signaling
MDC
MDIO
Interrupt
Turn
Around
Z
Idle
0
INT
Read Data
Sourced by PHY
MDIO FRAME
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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