- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄11576 > KSZ8873MLL AM TR (Micrel Inc)IC ETHERNET SWITCH 3PORT 64LQFP PDF資料下載
參數(shù)資料
| 型號(hào)： | KSZ8873MLL AM TR |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 33/115頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ETHERNET SWITCH 3PORT 64LQFP |
| 產(chǎn)品培訓(xùn)模塊： | KSZ8873 Ethernet Switches |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 控制器類型： | 以太網(wǎng)開關(guān)控制器 |
| 接口： | MII |
| 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： | 64-LQFP |
| 供應(yīng)商設(shè)備封裝： | 64-PQFP（10x10） |
| 包裝： | 帶卷 (TR) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁當(dāng)前第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁
Micrel, Inc.
KSZ8873MLL/FLL/RLL
September 20, 2013
24
Revision 1.6
LinkMD
Cable Diagnostics
KSZ8873MLL/FLL/RLL supports the LinkMD
. The LinkMD feature utilizes 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. Internal
circuitry displays the TDR information in a user-readable digital format.
Note: Cable diagnostics are only valid for copper connections and do not support fiber optic operation.
Access
LinkMD
is initiated by accessing the PHY special control/status registers {26, 42} and the LinkMD result registers {27, 43}
for ports 1 and 2 respectively; and in conjunction with the port registers control 13 for ports 1and 2 respectively to disable
Auto MDI/MDIX.
Alternatively, the MIIM PHY registers 0 and 29 can be used for LinkMD
access.
Usage
The following is a sample procedure for using LinkMD
with registers {42,43,45} on port 2:
1.
Disable auto MDI/MDI-X by writing a ‘1’ to Register 45, bit [2] to enable manual control over the differential pair used
to transmit the LinkMD
pulse.
2.
Start cable diagnostic test by writing a ‘1’ to Register 42, bit [4]. This enable bit is self-clearing.
3.
Wait (poll) for Register 42, bit [4] to return a ‘0’, indicating cable diagnostic test is completed.
4.
Read cable diagnostic test results in Register 42, bits [6:5]. The results are as follows:
00 = normal condition (valid test)
01 = open condition detected in cable (valid test)
10 = short condition detected in cable (valid test)
11 = cable diagnostic test failed (invalid test)
The ‘11’ case, invalid test, occurs when the KSZ8873MLL/FLL/RLL is unable to shut down the link partner. In this
instance, the test is not run, since it would be impossible for the KSZ8873MLL/FLL/RLL to determine if the detected
signal is a reflection of the signal generated or a signal from another source.
5.
Get distance to fault by concatenating Register 42, bit [0] and Register 43, bits [7:0]; and multiplying the result by a
constant of 0.4. The distance to the cable fault can be determined by the following formula:
D (distance to cable fault) = 0.4 x {( Register 26, bit [0]),(Register 27, bits [7:0])}
D (distance to cable fault) is expressed in meters.
Concatenated value of Registers 42 and 43 is converted to decimal before multiplying by 0.4.
The constant (0.4) may be calibrated for different cabling conditions, including cables with a velocity of propagation
that varies significantly from the norm.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PIC16C54CT-04I/SO | IC MCU OTP 512X12 18SOIC |
| PIC12CE519T-04I/SN | IC MCU OTP 1KX12 W/EE 8SOIC |
| V300A8C400BG | CONVERTER MOD DC/DC 8V 400W |
| LTC1955IUH#PBF | IC SMART CARD INTERFACE DL 32QFN |
| V300A8C400BF3 | CONVERTER MOD DC/DC 8V 400W |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KSZ8873MLL-EVAL | 功能描述:以太網(wǎng)開發(fā)工具 3-Port Fast Ethernet Switch with 1x MII Interface - Evaluation Board RoHS:否 制造商:Micrel 產(chǎn)品:Evaluation Boards 類型:Ethernet Transceivers 工具用于評(píng)估:KSZ8873RLL 接口類型:RMII 工作電源電壓: |
| KSZ8873MLLI | 功能描述:以太網(wǎng) IC 3-Port Fast Ethernet Switch with 1x RMII Interface (Industrial Grade, Lead Free) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| KSZ8873MLLJ | 功能描述:以太網(wǎng) IC 3-Port Fast Ethernet Switch with 1x RMII Interface (Extended Temp) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| KSZ8873MML | 功能描述:以太網(wǎng) IC 3-Port Fast Ethernet Switch with 2x MII Interface, Lead Free RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| KSZ8873MML-EVAL | 功能描述:以太網(wǎng)開發(fā)工具 3-Port Fast Ethernet Switch with 2x MII Interface - Evaluation Board RoHS:否 制造商:Micrel 產(chǎn)品:Evaluation Boards 類型:Ethernet Transceivers 工具用于評(píng)估:KSZ8873RLL 接口類型:RMII 工作電源電壓: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。