參數(shù)資料
型號: KSZ8841-PMQL-EVAL
廠商: Micrel Inc
文件頁數(shù): 9/74頁
文件大?。?/td> 0K
描述: BOARD EVALUATION KSZ8841-PMQL
標準包裝: 1
主要目的: 接口,以太網控制器(PHY 和 MAC)
嵌入式:
已用 IC / 零件: KSZ8841-PMQL
主要屬性: 1 個端口,100BASE-TX/10BASE-T
次要屬性: PCI 接口,LinkMD 線纜診斷
已供物品:
產品目錄頁面: 1114 (CN2011-ZH PDF)
相關產品: 576-2118-ND - IC MAC CTRLR 32BIT PCI 128-PQFP
576-2117-ND - IC MAC CTRLR 32BIT 128-PQFP
其它名稱: 576-1633
Micrel, Inc.
KSZ8841-PMQL
October 2007
17
M9999-100407-1.5
the decoder. When the input exceeds the squelch limit, the PLL locks onto the incoming signal and the KSZ8841-PMQL
decodes a data frame.
The receiver clock is maintained active during idle periods in between data reception.
MDI/MDI-X Auto Crossover
To eliminate the need for crossover cables between similar devices, the KSZ8841-PMQL supports HP-Auto MDI/MDI-X
and IEEE 802.3u standard MDI/MDI-X auto crossover. HP-Auto MDI/MDI-X is the default.
The auto-sense function detects remote transmit and receive pairs and correctly assigns transmit and receive pairs for
the KSZ8841-PMQL device. This feature is extremely useful when end users are unaware of cable types in addition to
saving on an additional uplink configuration connection. The auto-crossover feature can be disabled through the port
control registers.
The IEEE 802.3u standard MDI and MDI-X definitions are:
MDI
MDI-X
RJ45
Pins
Signals
RJ45
Pins
Signals
1
TD+
1
RD+
2
TD-
2
RD-
3
RD+
3
TD+
6
RD-
6
TD-
Table 1. MDI/MDI-X Pin Definitions
Straight Cable
A straight cable connects an MDI device to an MDI-X device or an MDI-X device to an MDI device. The following
diagram shows a typical straight cable connection between a network interface card (NIC) (MDI) and a switch (MDIX) or
a hub (MDI-X).
Figure 3. Typical Straight Cable Connection
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