参数资料
型号: KSZ8842-16MBLI TR
厂商: Micrel Inc
文件页数: 67/141页
文件大小: 0K
描述: IC ETHERNET SW 2PORT 100LFBGA
标准包装: 1,000
控制器类型: 以太网开关控制器
接口: PCI
电源电压: 3.1 V ~ 3.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 100-LBGA
供应商设备封装: 100-LFBGA
包装: 带卷 (TR)
Micrel, Inc.
KSZ8842-16/32 MQL/MVL/MVLI/MBL
October 2007
31
M9999-102207-1.9
Start Auto Negotiation
Force Link Setting
Listen for 10BASE-T Link
Pulses
Listen for 100BASE-TX
Idles
Attempt Auto
Negotiation
Link Mode Set
Bypass Auto Negotiation
and Set Link Mode
Link Mode Set ?
Parallel
Operation
Join
Flow
NO
YES
NO
YES
Figure 9. Auto Negotiation and Parallel Operation
LinkMD Cable Diagnostics
The KSZ8842M LinkMD uses time domain reflectometry (TDR) to analyze the cabling plant for common cabling problems
such as open circuits, short circuits, and impedance mismatches.
LinkMD works by sending a pulse of known amplitude and duration down the MDI and MDI-X pairs and then analyzes the
shape of the reflected signal. Timing the pulse duration gives an indication of the distance to the cabling fault with a
maximum distance of 200m and an accuracy of +/–2m. Internal circuitry displays the TDR information in a user-readable
digital format in registers P1VCT[8:0] or P2VCT[8:0].
Note: cable diagnostics are only valid for copper connections –fiber-optic operation is not supported.
Access
LinkMD is initiated by accessing register P1VCT/P2VCT, the LinkMD Control/Status register, in conjunction with register
P1CR4/P2CR4, the 100BASE-TX PHY Controller register.
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