參數(shù)資料
型號: KSZ8721CL-EVAL
廠商: Micrel Inc
文件頁數(shù): 7/32頁
文件大?。?/td> 0K
描述: BOARD EVALUATION FOR KSZ8721CL
標(biāo)準(zhǔn)包裝: 1
主要目的: 接口,以太網(wǎng) PHY
嵌入式:
已用 IC / 零件: KSZ8721CL
主要屬性: 1 個端口,100BASE-TX/100BASE-FX/10BASE-T
次要屬性: MII,RMII,HP 自動 MDI,MDI-X 自動極性校正
已供物品:
其它名稱: 576-1629
October 2004
15
M9999-100804
KS8721CL
Micrel
Auto-Crossover (Auto-MDI/MDI-X)
Automatic MDI/MDI-X configuration is intended to eliminate the need for crossover cables between similar devices. The
assignment of pinouts for a 10BASE-T/100BASE-TX crossover function cable is shown below.
This feature eliminates the confusion in applications by allowing the use of both straight and crossover cables. This feature
is controlled by register 1f:13. See the “Register 1fh–100BASE-TX PHY Controller” section for details.
Receive Pair
Transmit Pair
Receive Pair
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Transmit Pair
(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)
Modular Connector
Figure 1. Straight Through Cable
Receive Pair
Transmit Pair
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Transmit Pair
Modular Connector (RJ-45)
HUB
(Repeater or Switch)
Modular Connector (RJ-45)
HUB
(Repeater or Switch)
Crossover
Cable
10/100 Ethernet
Media Dependent Interface
10/100 Ethernet
Media Dependent Interface
Figure 2. Crossover Cable
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