參數(shù)資料
型號: KSZ8842-16MQL-EVAL
廠商: Micrel Inc
文件頁數(shù): 67/141頁
文件大?。?/td> 0K
描述: BOARD EVALUATION KSZ8842-16MQL
標(biāo)準(zhǔn)包裝: 1
主要目的: 接口,以太網(wǎng)控制器(PHY 和 MAC)
嵌入式:
已用 IC / 零件: KSZ8842-16MQL
主要屬性: 2 個(gè)端口,100BASE-TX/10BASE-T,管理型
次要屬性: 8/16 位接口,LinkMD 線纜診斷
已供物品: 板,CD,文檔,電源
產(chǎn)品目錄頁面: 1114 (CN2011-ZH PDF)
相關(guān)產(chǎn)品: 576-3076-ND - IC MAC CTLR 2PORT ETH 100-LFBGA
KSZ8842-32MQLA6-ND - IC SWITCH 10/100 32BIT 128PQFP
576-1479-ND - IC SWITCH 10/100 32BIT 128PQFP
576-1478-5-ND - IC SWITCH 10/100 16BIT 128PQFP
其它名稱: 576-1634
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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