參數(shù)資料
型號(hào)： KSZ8995FQ
廠商： Micrel Inc
文件頁(yè)數(shù)： 24/89頁(yè)
文件大?。?/td> 0K
描述： IC SWITCH 10/100 5PORT 128-PQFP
標(biāo)準(zhǔn)包裝： 66
系列： *
產(chǎn)品目錄頁(yè)面： 1081 (CN2011-ZH PDF)
配用： 576-3872-ND - BOARD EVALUATION FOR KSZ8995FQ
其它名稱： 576-3077
Micrel, Inc.
KS8995MA/FQ
October 2011
30
M9999-102611-3.0
Media Access Controller (MAC) Operation
The KS8995MA/FQ strictly abides by IEEE 802.3 standards to maximize compatibility.
Inter-Packet Gap (IPG)
If a frame is successfully transmitted, the 96-bit time IPG is measured between the two consecutive MTXEN. If the current
packet is experiencing collision, the 96-bit time IPG is measured from MCRS and the next MTXEN.
Backoff Algorithm
The KS8995MA/FQ implements the IEEE Std. 802.3 binary exponential back-off algorithm, and optional “aggressive
mode” back off. After 16 collisions, the packet will be optionally dropped depending on the chip configuration in Register 3.
See “Register 3.”
Late Collision
If a transmit packet experiences collisions after 512-bit times of the transmission, the packet will be dropped.
Illegal Frames
The KS8995MA/FQ discards frames less than 64 bytes and can be programmed to accept frames up to 1536 bytes in
Register 4. For special applications, the KS8995MA/FQ can also be programmed to accept frames up to 1916 bytes in
Register 4. Since the KS8995MA/FQ supports VLAN tags, the maximum sizing is adjusted when these tags are present.
Flow Control
The KS8995MA/FQ supports standard 802.3x flow control frames on both transmit and receive sides.
On the receive side, if the KS8995MA/FQ receives a pause control frame, the KS8995MA/FQ 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 (being
flow controlled), only flow control packets from the KS8995MA/FQ will be transmitted.
On the transmit side, the KS8995MA/FQ has intelligent and efficient ways to determine when to invoke flow control. The
flow control is based on availability of the system resources, including available buffers, available transmit queues and
available receive queues.
The KS8995MA/FQ flow controls a port that has just received a packet if the destination port resource is busy. The
KS8995MA/FQ issues a flow control frame (XOFF), containing the maximum pause time defined in IEEE standard 802.3x.
Once the resource is freed up, the KS8995MA/FQ sends out the other flow control frame (XON) with zero pause time to
turn off the flow control (turn on transmission to the port). A hysteresis feature is also provided to prevent over-activation
and deactivation of the flow control mechanism.
The KS8995MA/FQ flow controls all ports if the receive queue becomes full.
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KSZ8995FQ-EVAL 功能描述:以太網(wǎng)開(kāi)發(fā)工具 Integrated 5-Port Switch with Fiber on Port 3 & 4 Evaluation Board RoHS:否 制造商:Micrel 產(chǎn)品:Evaluation Boards 類(lèi)型:Ethernet Transceivers 工具用于評(píng)估:KSZ8873RLL 接口類(lèi)型:RMII 工作電源電壓:
KSZ8995FQI 功能描述:以太網(wǎng) IC 5 Port 10/100 Switch with PHY and Frame Buffers (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
KSZ8995M 功能描述:以太網(wǎng) IC 5 Port 10/100 Switch with PHY and Frame Buffers (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
KSZ8995MA 功能描述:以太網(wǎng) IC 5 Port 10/100 Switch with PHY and Frame Buffers (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
KSZ8995MA4 功能描述:IC SWITCH 5-PORT 10/100 128PQFP RoHS:是 類(lèi)別:集成電路 (IC) >> 專(zhuān)用 IC 系列:* 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類(lèi)型:調(diào)幀器 應(yīng)用:數(shù)據(jù)傳輸 安裝類(lèi)型:表面貼裝 封裝/外殼:400-BBGA 供應(yīng)商設(shè)備封裝:400-PBGA（27x27） 包裝:散裝
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