can be run at any time by ensuring " />
參數(shù)資料
型號(hào)： KSZ8851SNLI TR
廠商： Micrel Inc
文件頁(yè)數(shù)： 13/80頁(yè)
文件大?。?/td> 0K
描述： IC ETHERNET CTLR 1PORT PCI 32MLF
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： -40°C ~ 85°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(yè)面： 1081 (CN2011-ZH PDF)
其它名稱： 576-3506-6
Micrel, Inc.
KSZ8851SNL/SNLI
August 2009
20
M9999-083109-2.0
Usage
LinkMD
can be run at any time by ensuring that Auto-MDIX has been disabled. To disable Auto-MDIX, write a ‘1’ to
P1CR[10] to enable manual control over the pair used to transmit the LinkMD
pulse. The self-clearing cable diagnostic
test enable bit, P1SCLMD [12], is set to ‘1’ to start the test on this pair.
When bit P1SCLMD[12] returns to ‘0’, the test is complete. The test result is returned in bits P1SCLMD[14:13] and the
distance is returned in bits P1SCLMD[8:0]. The cable diagnostic test results are as follows:
00 = Valid test, normal condition
01 = Valid test, open circuit in cable
10 = Valid test, short circuit in cable
11 = Invalid test, LinkMD
failed
If P1SCLMD[14:13]=11, this indicates an invalid test, and occurs when the KSZ8851SNL is unable to shut down the link
partner. In this instance, the test is not run, as it is not possible for the KSZ8851SNL to determine if the detected signal is
a reflection of the signal generated or a signal from another source.
Cable distance can be approximated by the following formula:
P1SCLMD[8:0] x 0.4m for port 1 cable distance
This constant may be calibrated for different cabling conditions, including cables with a velocity of propagation that varies
significantly from the norm.
Media Access Control (MAC) Operation
The KSZ8851SNL strictly abides by IEEE 802.3 standards to maximize compatibility.
Inter Packet Gap (IPG)
If a frame is successfully transmitted, then the minimum 96-bit time for IPG is measured between two consecutive
packets. If the current packet is experiencing collisions, the minimum 96-bit time for IPG is measured from carrier sense
(CRS) to the next transmit packet.
Back-Off Algorithm
The KSZ8851SNL implements the IEEE standard 802.3 binary exponential back-off algorithm in half-duplex mode. After
16 collisions, the packet is dropped.
Late Collision
If a transmit packet experiences collisions after 512 bit times of the transmission, the packet is dropped.
Flow Control
The KSZ8851SNL supports standard 802.3x flow control frames on both transmit and receive sides.
On the receive side, if the KSZ8851SNL receives a pause control frame, the KSZ8851SNL will not transmit the next
normal frame until the timer, specified in the pause control frame, expires. If another pause frame is received before the
current timer expires, the timer will be updated with the new value in the second pause frame. During this period (while it
is flow controlled), only flow control packets from the KSZ8851SNL are transmitted.
On the transmit side, the KSZ8851SNL has intelligent and efficient ways to determine when to invoke flow control. The
flow control is based on availability of the system resources.
There are three programmable low watermark register FCLWR (0xB0), high watermark register FCHWR (0xB2) and
overrun watermark register FCOWR (0xB4) for flow control in RXQ FIFO. The KSZ8851SNL will send PAUSE frame
when the RXQ buffer hit the high watermark level (default 3.072 KByte available) and stop PAUSE frame when the RXQ
buffer hit the low watermark level (default 5.12 KByte available). The KSZ8851SNL will drop packet when the RXQ buffer
hit the overrun watermark level (default 256-Byte available).
The KSZ8851SNL issues a flow control frame (Xoff, or transmitter off), containing the maximum pause time defined in
IEEE standard 802.3x. Once the resource is freed up, the KSZ8851SNL sends out the another flow control frame (Xon, or
相關(guān)PDF資料
PDF描述
KSZ8862-16MQL IC SWITCH 10/100 16BIT 128-PQFP
KSZ8862-32MQL IC ETHERNET SW 2PORT BUS 128PQFP
KSZ8863MLLI IC ETHERNET SWITCH 3PORT 48-LQFP
KSZ8864RMNI IC ETHERNET SWITCH 4PORT 64QFN
KSZ8873FLLI IC ETHERNET SWITCH 3PORT 64LQFP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
KSZ8851SNLTR 制造商:Micrel Inc 功能描述:
KSZ8851SNL-TR 功能描述:Ethernet Controller 10/100 Base-T/TX PHY SPI Interface 32-MLF? (5x5) 制造商:microchip technology 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 協(xié)議:以太網(wǎng) 功能:控制器 接口:SPI 標(biāo)準(zhǔn):10/100 Base-T/TX PHY 電壓 - 電源:1.8V，2.5V，3.3V 電流 - 電源:- 工作溫度:0°C ~ 70°C 封裝/外殼:32-VFQFN 裸露焊盤，32-MLF? 供應(yīng)商器件封裝:32-MLF?（5x5） 標(biāo)準(zhǔn)包裝:1
KSZ8852HLE-EVAL 功能描述:KSZ8852HLE - Interface, Ethernet Control Evaluation Board 制造商:microchip technology 系列:- 零件狀態(tài):有效 主要用途:接口，以太網(wǎng)控制 嵌入式:否 使用的 IC/零件:KSZ8852HLE 主要屬性:- 輔助屬性:- 所含物品:板 標(biāo)準(zhǔn)包裝:1
KSZ8852HLEWA 功能描述:Ethernet Switch 10/100 Base-FX/T/TX PHY Ethernet Interface 64-LQFP (10x10) 制造商:microchip technology 系列:- 包裝:托盤 零件狀態(tài):有效 協(xié)議:以太網(wǎng) 功能:開(kāi)關(guān) 接口:以太網(wǎng) 標(biāo)準(zhǔn):10/100 Base-FX/T/TX PHY 電壓 - 電源:3.3V 電流 - 電源:- 工作溫度:-40°C ~ 115°C 封裝/外殼:64-LQFP 裸露焊盤 供應(yīng)商器件封裝:64-LQFP（10x10） 標(biāo)準(zhǔn)包裝:160
KSZ8852HLEYA 功能描述:Ethernet Switch 10/100 Base-FX/T/TX PHY Ethernet Interface 64-LQFP (10x10) 制造商:microchip technology 系列:- 包裝:托盤 零件狀態(tài):有效 協(xié)議:以太網(wǎng) 功能:開(kāi)關(guān) 接口:以太網(wǎng) 標(biāo)準(zhǔn):10/100 Base-FX/T/TX PHY 電壓 - 電源:3.3V 電流 - 電源:- 工作溫度:-40°C ~ 115°C 封裝/外殼:64-LQFP 裸露焊盤 供應(yīng)商器件封裝:64-LQFP（10x10） 標(biāo)準(zhǔn)包裝:160
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*