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参数资料
型号： KS8993F
厂商： Micrel Inc
文件页数： 24/99页
文件大小： 0K
描述： IC CONV MED 10/100 3PORT 128PQFP
标准包装： 66
系列： *
类型： *
应用： *
安装类型： 表面贴装
封装/外壳： 128-BFQFP
供应商设备封装： 128-PQFP（14x20）
配用： KS8993F-EVAL-ND - EVAL KIT EXPERIMENTAL KS8993F
KS8993F
Micrel
August 26, 2004
Revision 1.0
- 30 -
1. The received packet's Source Address (SA) does not exist in the look up table.
2. The received packet is good, has no receiving errors, and is of legal length.
The look up engine will insert the qualified Source Address into the table, along with the port number and time stamp.
If the table is full, the last entry of the table will be deleted to make room for the new entry.
2.4.3
Migration
The internal look up engine also monitors whether a station has moved. If so, it will update the table accordingly.
Migration happens when the following conditions are met:
1. The received packet's Source Address (SA) is in the table but the associated source port information is
different.
2. The received packet is good, has no receiving errors, and is of legal length.
The look up engine will update the existing record in the table with the new source port information.
2.4.4
Aging
The look up engine will update the time stamp information of a record whenever the corresponding Source Address
appears. The time stamp is used in the aging process. If a record is not updated for a period of time, the look up
engine will remove the record from the table. The look up engine constantly performs the aging process and will
continuously remove aging records. The aging period is 300 + 75 seconds. This feature can be enabled or disabled
through Global Register 3 (0x03).
2.4.5
Forwarding
The KS8993F will forward packets using an algorithm that is depicted in the following flowcharts. Figure 4 shows stage
one of the forwarding algorithm where the search engine looks up the VLAN ID, static table, and dynamic table for the
destination address, and comes up with “port to forward 1” (PTF1). PTF1 is then further modified by Spanning Tree,
Port Mirroring and Port VLAN processes to come up with “port to forward 2” (PTF2) as shown in Figure 5. PTF2 is
where the packet will be sent.
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相关代理商/技术参数
参数描述
KS8993F-A1 功能描述:IC CONV MED 10/100 3PORT 128PQFP RoHS:否 类别:集成电路 (IC) >> 专用 IC 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:调帧器 应用:数据传输 安装类型:表面贴装 封装/外壳:400-BBGA 供应商设备封装:400-PBGA（27x27） 包装:散装
KS8993FA5 功能描述:IC SWITCH 3-PORT 10/100 128-PQFP RoHS:否 类别:集成电路 (IC) >> 专用 IC 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:调帧器 应用:数据传输 安装类型:表面贴装 封装/外壳:400-BBGA 供应商设备封装:400-PBGA（27x27） 包装:散装
KS8993F-EVAL 功能描述:EVAL KIT EXPERIMENTAL KS8993F RoHS:否 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 主要目的:电源管理，电池充电器 嵌入式:否 已用 IC / 零件:MAX8903A 主要属性:1 芯锂离子电池 次要属性:状态 LED 已供物品:板
KS8993FL 功能描述:IC CONV MED 10/100 SGL 128PQFP RoHS:否 类别:集成电路 (IC) >> 专用 IC 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:调帧器 应用:数据传输 安装类型:表面贴装 封装/外壳:400-BBGA 供应商设备封装:400-PBGA（27x27） 包装:散装
KS8993FL-EVAL 功能描述:BOARD EVAL EXPERIMENT KS8993F RoHS:否 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 主要目的:电源管理，电池充电器 嵌入式:否 已用 IC / 零件:MAX8903A 主要属性:1 芯锂离子电池 次要属性:状态 LED 已供物品:板
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