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參數(shù)資料
| 型號： | LXT970A |
| 廠商： | Intel Corp. |
| 英文描述： | Dual-Speed Fast Ethernet Transceiver |
| 中文描述： | 雙速度快速以太網(wǎng)收發(fā)器 |
| 文件頁數(shù)： | 18/74頁 |
| 文件大?。?/td> | 1061K |
| 代理商： | LXT970A |
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LXT970A
—
Dual-Speed Fast Ethernet Transceiver
18
Datasheet
2.0
Functional Description
2.1
Introduction
The LXT970A, a new-generation version of the LXT970 10/100 PHY Fast Ethernet Transceiver
incorporates several functional enhancements for a more robust Ethernet solution. The LXT970A
supports optional MII driver strength capabilities and link-loss criteria selectable via the MDIO
register set.
The LXT970A can directly drive a twisted-pair cable for up to 100 meters. The LXT970A also
provides a pseudo-ECL interface for driving a 100BASE-FX fiber connection. On power-up, the
LXT970A uses auto-negotiation with parallel detection to automatically determine line operating
conditions. If the PHY device on the other side of the link supports auto-negotiation, the
LXT970A auto-negotiates using Fast Link Pulse (FLP) bursts. If the PHY partner does not support
auto-negotiation, the LXT970A automatically detects the presence of either link pulses (10 Mbps
PHY) or Idle symbols (100 Mbps PHY) and set its operating speed accordingly. When the line
speed selection is made via the parallel detection method, the duplex mode sets to half. The user
may later select full-duplex operation by subsequent writes to the appropriate MDIO register. Line
operation can also be set using the Hardware Control Interface.
The LXT970A interfaces to a 10/100 MAC through the MII interface. The LXT970A performs all
functions of the Physical Coding Sublayer (PCS) and Physical Media Attachment (PMA) sublayer
as defined in the IEEE 802.3 100BASE-X specification. It also performs all Physical Media
Dependent (PMD) sublayer functions for 100BASE-TX connections. The MII speed is
automatically set once line operating conditions have been determined.
See
Figure 3
for a typical Network Interface Card (NIC). The LXT970A supports NIC, repeater,
and switch applications. It provides half- and full-duplex operation at 100 Mbps and 10 Mbps. The
LXT970A supports the 802.3 MDIO register set. Specific bits in the registers are referenced using
an
“
X.Y
”
notation, where X is the register address (0-6 or 16-20) and Y is the bit number (0:15).
Figure 3. Network Interface Card (NIC) Application
PC Bus (EISA,PCI)
MAC Controller
LXT970A
Magnetic
RJ-45
Connection
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LXT970 | Fast Ethernet Transceiver |
| LXT970QC | Fast Ethernet Transceiver |
| LXT971A | 3.3V Dual-Speed Fast Ethernet PHY Transceiver |
| LXT972A | 3.3V Dual-Speed Fast Ethernet Transceiver Datasheet |
| LXT972ALC | 3.3V Dual-Speed Fast Ethernet Transceiver Datasheet |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LXT970AQC | 制造商:LEVEL ONE 功能描述: 制造商:LEVELONE 功能描述: 制造商: 功能描述: 制造商:LEVEL1 功能描述: |
| LXT970AQC.B11 | 制造商:Intel 功能描述: |
| LXT970ATC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecomm/Datacomm |
| 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 |
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