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参数资料
| 型号： | KSZ8862-16MQL-FX |
| 厂商： | Micrel Inc |
| 文件页数： | 52/125页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH ETH 2P 16BIT 128PQFP |
| 标准包装： | 66 |
| 系列： | KSZ8862 |
| 控制器类型： | 以太网开关控制器 |
| 接口： | PCI |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 128-BFQFP |
| 供应商设备封装： | 128-PQFP（14x20） |
| 包装： | 托盘 |
| 产品目录页面： | 1081 (CN2011-ZH PDF) |
| 配用： | 576-1638-ND - BOARD EVALUATION KSZ8862-10FL 576-1637-ND - BOARD EVALUATION KSZ8862-100FX |
| 其它名称： | 576-3271 |
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Micrel, Inc.
KSZ8862-16/32MQL
April 2007
32
M9999-040407-3.0
Switching Engine
The KSZ8862M features a high-performance switching engine to move data to and from the MAC’s packet buffers. It
operates in store and forward mode, while the efficient switching mechanism reduces overall latency.
The switching engine has a 32KB internal frame buffer. This resource is shared between all the ports. There are a total of
256 buffers available. Each buffer is sized at 128B.
MAC Operation
The KSZ8862M strictly abides by IEEE 802.3 standards to maximize compatibility. Additionally, there is an added MAC
filtering function to filter Unicast packets. The MAC filtering function is useful in applications such as VoIP where
restricting certain packets reduces congestion and thus improves performance.
Inter Packet Gap (IPG)
If a frame is successfully transmitted, the minimum 96-bit time for IPG is measured between two consecutive packets. If
the current packet is experiencing collisions, then the minimum 96-bit time for IPG is measured from carrier sense (CRS)
to the next transmit packet.
Back-Off Algorithm
The KSZ8862M implements the IEEE standard 802.3 binary exponential back-off algorithm in half-duplex mode, and
optional "aggressive mode" back-off. After 16 collisions, the packet is optionally dropped depending upon the switch
configuration in SGCR1 [8].
Late Collision
If a transmit packet experiences collisions after 512 bit times of the transmission, then the packet is dropped.
Legal Packet Size
The KSZ8862M discards packets less than 64 bytes and can be programmed to accept packet size up to 1536 bytes in
SGCR2 [1]. The KSZ8862M can also be programmed for special applications to accept packet size up to 1916 bytes in
SGCR2 [2].
Flow Control
The KSZ8862M supports standard 802.3x flow control frames on both transmit and receive sides.
On the receive side, if the KSZ8862M receives a pause control frame, the KSZ8862M 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 KSZ8862M are transmitted.
On the transmit side, the KSZ8862M 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 KSZ8862M will flow control a port that has just received a packet if the destination port resource is busy. The
KSZ8862M issues a flow control frame (Xoff), containing the maximum pause time as defined in IEEE standard 802.3x.
Once the resource is freed up, the KSZ8862M then 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 provided to prevent the flow control
mechanism from being constantly activated and deactivated.
The KSZ8862M flow controls all ports if the receive queue becomes full.
Half-Duplex Backpressure
A half-duplex backpressure option (not in IEEE 802.3 standards) is also provided. The activation and deactivation
conditions are the same in full-duplex mode. If backpressure is required, then the KSZ8862M sends preambles to defer
the other stations' transmission (carrier sense deference).
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相关代理商/技术参数 |
参数描述 |
|---|---|
| KSZ8862-32MQL | 功能描述:以太网 IC 2-Port Ethernet Switch/Repeater + Generic (32-bit) bus interface. Fiber Capabilities on Port-1(Lead Free) RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| KSZ8862-32MQL-FX | 功能描述:以太网 IC 2-Port Ethernet Switch/Repeater + Generic (32-bit) bus interface. Fiber Capabilities on Port-1(Lead Free) RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| KSZ8862-MQL | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:2-Port Ethernet Switch with Non-PCI Interface and Fiber Support |
| KSZ8863FLL | 功能描述:以太网 IC 3-Port 10/100 Ethernet Switch with 1x FX Port and 1x TX Port (Lead Free) RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| KSZ8863FLL-EVAL | 功能描述:以太网开发工具 3-Port 10/100 Ethernet Switch with 1x FX Port and 1x TX Port - Evaluation Board RoHS:否 制造商:Micrel 产品:Evaluation Boards 类型:Ethernet Transceivers 工具用于评估:KSZ8873RLL 接口类型:RMII 工作电源电压: |
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