参数资料
| 型号： | KS8995MAL |
| 厂商： | Micrel Inc |
| 文件页数： | 22/73页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH 10/100 5PORT 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） |
| 包装： | 散装 |
| 配用： | 576-1017-ND - BOARD EVAL EXPERIMENT KS8995M |
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May 2005
29
M9999-051305
KS8995MA
Micrel, Inc.
Learning state: only packets to and from the processor are forwarded. Learning is enabled.
Port setting: “transmit enable = 0, receive enable = 0, learning disable = 0.”
Software action: The processor should program the static MAC table with the entries that it needs to receive (e.g., BPDU
packets). The “overriding” bit should be set so that the switch will forward those specific packets to the processor. The processor
may send packets to the port(s) in this state, see “Special Tagging Mode” section for details. Address learning is enabled on
the port in this state.
Forwarding state: packets are forwarded and received normally. Learning is enabled.
Port setting: “transmit enable = 1, receive enable = 1, learning disable = 0.”
Software action: The processor should program the static MAC table with the entries that it needs to receive (e.g., BPDU
packets). The “overriding” bit should be set so that the switch will forward those specific packets to the processor. The processor
may send packets to the port(s) in this state, see “Special Tagging Mode” section for details. Address learning is enabled on
the port in this state.
Special Tagging Mode
The special tagging mode is designed for spanning tree protocol IGMP snooping and is flexible for use in other applications.
The special tagging mode, similar to 802.1q, requires software to change network drivers to insert/modify/strip/interpret the
special tag. This mode is enabled by setting both Register 11 bit 0 and Register 80 bit 2.
802.1q Tag Format
Special Tag Format
TPID (tag protocol identifier, 0x8100) + TCI
STPID (special tag identifier, 0x8100) + TCI 0x810 + 4 bit for “port mask”) + TCI
Table 4. Special Tagging Mode Format
The STPID will only be seen and used on the port 5 interface, which should be connected to a processor. Packets from the
processor to the switch should be tagged with STPID and the port mask defined as below:
“0001” packet to port 1 only
“0010” packet to port 2 only
“0100” packet to port 3 only
“1000” packet to port 4 only
“0011” packet broadcast to port 1 and port 2.
.....
“1111” packet broadcast to port 1, 2, 3 and 4.
“0000” normal tag, will use the KS8995MA internal look-up result. Normal packets should use this setting. If packets from the
processors do not have a tag, the KS8995MA will treat them as normal packets and an internal look-up will be performed.
The KS8995MA uses a non-zero “port mask” to bypass the look-up result and override any port setting, regardless of port states
(blocking, disable, listening, learning). Table 5 shows the egress rules when dealing with STPID.
相关PDF资料 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| KS8995M-EVAL | 功能描述:BOARD EVAL EXPERIMENT KS8995M 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 |
| KS8995MI | 功能描述:IC SWITCH 10/100 5PORT 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 |
| KS8995X | 功能描述:IC SWITCH 10/100 5PORT 128PQFP RoHS:是 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 |
| KS8995X_04 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Integrated 5-Port 10/100 QoS Switch |
| KS8995XA | 功能描述:IC SWITCH 10/100 5PORT 128PQFP RoHS:是 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 |
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