參數(shù)資料
型號: KSZ8851SNL TR
廠商: Micrel Inc
文件頁數(shù): 11/80頁
文件大?。?/td> 0K
描述: IC CTLR MAC/PHY NON-PCI 32-MLF
產(chǎn)品培訓(xùn)模塊: KSZ8851 10/100 Embedded Controllers
標(biāo)準(zhǔn)包裝: 1
控制器類型: 以太網(wǎng)控制器,MAC/PHY
接口: 總線
電源電壓: 1.8V,2.5V,3.3V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 32-VFQFN 裸露焊盤,32-MLF?
供應(yīng)商設(shè)備封裝: 32-MLF?(5x5)
包裝: 標(biāo)準(zhǔn)包裝
產(chǎn)品目錄頁面: 1081 (CN2011-ZH PDF)
配用: 576-3293-ND - BOARD EVALUATION KSZ8851SNL
其它名稱: 576-3299-6
Micrel, Inc.
KSZ8851SNL/SNLI
August 2009
19
M9999-083109-2.0
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
Start Auto Negotiation
Figure 5. Auto Negotiation and Parallel Operation
LinkMD
Cable Diagnostics
The KSZ8851SNL 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 register P1SCLMD[8:0].
Note: cable diagnostics are only valid for copper connections – fiber-optic operation is not supported.
Access
LinkMD
is initiated by accessing register P1SCLMD, the PHY special control/status and LinkMD register (0xF4).
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