参数资料
| 型号： | KS8995M |
| 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 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页当前第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页
December 2003
29
M9999-120403
KS8995M
Micrel
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 KS8995M internal look-up result. Normal packets should use this setting. If packets from the
processors do not have a tag, the KS8995M will treat them as normal packets and an internal look-up will be performed.
The KS8995M 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). The Table 5 shows the egress rules when dealing with STPID.
相关PDF资料 |
PDF描述 |
|---|---|
| KS8993M | IC SWITCH 10/100 3PORT 128PQFP |
| ESA49DTAH | CONN EDGECARD 98POS R/A .125 SLD |
| EMA49DTAH | CONN EDGECARD 98POS R/A .125 SLD |
| LFXP20E-4F388C | IC FPGA 19.7KLUTS 268I/O 388-BGA |
| ESA49DTAD | CONN EDGECARD 98POS R/A .125 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| KS8995M_0607 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Integrated 5-Port 10/100 Managed Switch |
| KS8995MA | 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 |
| KS8995MA_11 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Integrated 5-Port 10/100 Managed Switch |
| KS8995MA-EVAL | 功能描述:BOARD EVAL EXPERIMENT KS8995MA RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 类型:MCU 适用于相关产品:Freescale MC68HC908LJ/LK（80-QFP ZIF 插口） 所含物品:面板、缆线、软件、数据表和用户手册 其它名称:520-1035 |
| KS8995MAI | 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 |
发布紧急采购，3分钟左右您将得到回复。