參數(shù)資料
型號: KSZ8041FTL
廠商: Micrel Inc
文件頁數(shù): 20/58頁
文件大小: 0K
描述: IC TXRX PHY 10/100 LV/LP 48-TQFP
標(biāo)準(zhǔn)包裝: 250
類型: 收發(fā)器
驅(qū)動器/接收器數(shù): 1/1
規(guī)程: SMII
電源電壓: 3.135 V ~ 3.465 V
安裝類型: 表面貼裝
封裝/外殼: 48-TQFP
供應(yīng)商設(shè)備封裝: 48-TQFP(7x7)
包裝: 托盤
產(chǎn)品目錄頁面: 1080 (CN2011-ZH PDF)
配用: 576-3294-ND - KIT EVAL KSZ8041FTL EXPERIMENT
其它名稱: 576-1672
KSZ8041FTL-ND
Micrel, Inc.
KSZ8041TL/FTL
April 2007
27
M9999-042707-1.1
HP Auto MDI/MDI-X
HP Auto MDI/MDI-X configuration eliminates the confusion of whether to use a straight cable or a crossover cable
between the KSZ8041TL/FTL and its link partner. This feature allows the KSZ8041TL/FTL to use either type of cable to
connect with a link partner that is in either MDI or MDI-X mode. The auto-sense function detects transmit and receive
pairs from the link partner, and then assigns transmit and receive pairs of the KSZ8041TL/FTL accordingly.
HP Auto MDI/MDI-X is enabled by default. It is disabled by writing a one to register 1F bit 13. MDI and MDI-X mode is
selected by register 1F bit 14 if HP Auto MDI/MDI-X is disabled.
An isolation transformer with symmetrical transmit and receive data paths is recommended to support auto MDI/MDI-X.
The IEEE 802.3u Standard defines MDI and MDI-X as follow:
MDI
MDI-X
RJ-45 Pin
Signal
RJ-45 Pin
Signal
1
TD+
1
RD+
2
TD-
2
RD-
3
RD+
3
TD+
6
RD-
6
TD-
Table 9. MDI/MDI-X Pin Definition
Straight Cable
A straight cable connects a MDI device to a MDI-X device, or a MDI-X device to a MDI device. The following diagram
depicts a typical straight cable connection between a NIC card (MDI) and a switch, or hub (MDI-X).
Receive Pair
Transmit Pair
Receive Pair
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Transmit Pair
Modular Connector
(RJ-45)
NIC
Straight
Cable
10/100 Ethernet
Media Dependent Interface
10/100 Ethernet
Media Dependent Interface
Modular Connector
(RJ-45)
HUB
(Repeater or Switch)
Figure 4. Typical Straight Cable Connection
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