参数资料
| 型号： | KSZ8993M |
| 厂商： | Micrel Inc |
| 文件页数： | 28/85页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH 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） |
| 包装： | 托盘 |
| 产品目录页面： | 1081 (CN2011-ZH PDF) |
| 其它名称： | 576-1037 |
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Micrel, Inc.
KS8993M/ML/MI
April 2005
34
M9999-041205
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” 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” for details. Address learning is enabled on the port in this state.
Upstream Special Tagging Mode
Upstream Special Tagging Mode is designed for spanning tree protocol IGMP snooping and is flexible for use in
other applications. The Upstream Special Tagging Mode, similar to 802.1Q, requires software to change network
drivers to modify/strip/interpret the special tag. This mode is enabled by setting both register 11 bit 0 and register
48 bit 2 to “1”.
802.1Q Tag Format
Special Tag Format
TPID (tag protocol identifier, 0x8100) + TCI.
STPID (special tag identifier, 0x810 +
4 bit for “port mask”) + TCI
Table 7. Upstream Special Tagging Mode Format
The STPID is only seen and used by the port 3 interface, which should be connected to a processor.
The KS8993M uses a non-zero “port mask” to bypass the lookup result and override any port setting, regardless
of port states (disable, blocking, listening, learning).
For packets from regular ports (port 1 & port 2) to port 3, the port mask is used to tell the processor which port the
packets were received on, defined as follows:
“0001” from port 1
“0010” from port 2
No port mask values, other than the previous two defined ones, should be received in Upstream Special Tagging
Mode. The egress rules are defined as follows:
Ingress Packets
Egress Action to Tag Field
Tagged with 0x8100 + TCI
- Modify TPID to 0x810 + “port mask”, which indicates source port.
- No change to TCI if VID is not null
- Replace null VID with ingress port VID
- Recalculate CRC
Not tagged.
- Insert TPID to 0x810 + “port mask”, which indicates source port
– Insert TCI with ingress port VID
- Recalculate CRC
Table 8. STPID Egress Rules (Switch Port 3 to Processor)
相关PDF资料 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| KSZ8993MA5 | 功能描述:IC SWITCH 10/100 W/TXRX 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 |
| KSZ8993M-EVAL | 功能描述:以太网开发工具 KSZ8993M 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: |
| KSZ8993MI | 功能描述:以太网 IC 2+1 Port 10/100 Switch w/Tranceivers & Frame Buffers, 128-Ld PQFP (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 |
| KSZ8993ML | 功能描述:以太网 IC 2+1 Port 10/100 Switch w/Tranceivers & Frame Buffers, 128-Ld PQFP(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 |
| KSZ8993ML-EVAL | 功能描述:以太网开发工具 KSZ8993ML 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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