- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377799 > LXT970A (Intel Corp.) Dual-Speed Fast Ethernet Transceiver PDF資料下載
參數(shù)資料
| 型號(hào)： | 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)： | 29/74頁 |
| 文件大小： | 1061K |
| 代理商： | LXT970A |
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頁當(dāng)前第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頁第69頁第70頁第71頁第72頁第73頁第74頁
Dual-Speed Fast Ethernet Transceiver
—
LXT970A
Datasheet
29
2.3.3
Bias Circuit Requirements
A 22.1 k
1% resistor must be tied between the RBIAS input and ground. High-speed signals
should be kept away from this resistor. Follow the layout recommendations given in the Design
Recommendations section on
page 42
.
2.4
Initialization
At power-up or reset, the LXT970A performs the initialization sequence shown in
Figure 11
.
2.4.1
Control Mode Selection
Mode control selection is provided via the MDDIS pin as shown in
Table 15
. When pin 15
(MDDIS) is High, the LXT970A enters Manual Control Mode. When MDDIS is Low, MDIO
Control Mode is enabled.
2.4.1.1
MDIO Control Mode
In the MDIO Control mode, the LXT970A reads the Hardware Control Interface pins to set the
initial (default) values of the MDIO registers. Once the initial values are set, bit control reverts to
the MDIO interface.
2.4.1.2
Manual Control Mode
In the Manual Control Mode, LXT970A disables direct write operations to the MDIO registers via
the MDIO Interface. The LXT970A continuously monitors the Hardware Control Interface pins
and updates the MDIO registers accordingly.
2.4.2
Link Configuration
When the LXT970A 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 LXT970A first checks the
MDIO registers (initialized via the Hardware Control Interface or MDIO Interface) for operating
instructions. Both control modes allow the user to either force the LXT970A to a specific
configuration or allow it to auto-negotiate the optimum configuration with its link partner.
Table 15. Mode Control Settings
Mode
MDDIS
RESET
PWRDWN
MDIO Control
Low
High
Low
Manual Control
High
High
Low
Reset
-
Low
Low
Power Down
-
-
High
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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。