- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄1932 > KSZ8873MLLJ (Micrel Inc)IC ETHERNET SWITCH 3PORT 64LQFP PDF資料下載
參數(shù)資料
| 型號： | KSZ8873MLLJ |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 37/108頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ETHERNET SWITCH 3PORT 64LQFP |
| 特色產(chǎn)品： | KSZ8873MLLJ Ethernet Switches |
| 標準包裝： | 160 |
| 系列： | * |
| 其它名稱： | 576-3996 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁當(dāng)前第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁
Micrel, Inc.
KSZ8873MLLJ
September 2011
34
M9999-091911-1.8
Rapid Spanning Tree Support
There are three operational states of the Discarding, Learning, and Forwarding assigned to each port for RSTP:
Discarding ports do not participate in the active topology and do not learn MAC addresses.
Discarding state: the state includs three states of the disable, blocking and listening of STP.
Port setting: "transmit enable = 0, receive enable = 0, learning disable = 1."
Software action: the processor should not send any packets to the port. The switch may still send specific packets to the
processor (packets that match some entries in the static table with “overriding bit” set) and the processor should discard
those packets. When disable the port’s learning capability (learning disable=’1’), set the register 2 bit 5 and bit 4 will flush
rapidly the port related entries in the dynamic MAC table and static MAC table.
Note: processor is connected to port 3 via MII interface. Address learning is disabled on the port in this state.
Ports in Learning states learn MAC addresses, but do not forward user traffic.
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 “Tail Tagging Mode” section for details. Address learning is
enabled on the port in this state.
Ports in Forwarding states fully participate in both data forwarding and MAC learning.
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 “Tail Tagging Mode” section for details. Address learning is
enabled on the port in this state.
RSTP uses only one type of BPDU called RSTP BPDUs. They are similar to STP Configuration BPDUs with the exception
of a type field set to “version 2” for RSTP and “version 0” for STP, and a flag field carrying additional information.
Tail Tagging Mode
The Tail Tag is only seen and used by the port 3 interface, which should be connected to a processor. It is an effective
way to retrieve the ingress port information for spanning tree protocol IGMP snooping and other applications. The Bit 1
and bit 0 in the one byte tail tagging is used to indicate the source/destination port in port 3. Bit 3 and bit 2 are used for the
priority setting of the ingress frame in port 3. Other bits are not used. The Tail Tag feature is enable by setting register 3
bit 6.
Figure 7. Tail Tag Frame Format
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| KSZ8873MMLI | IC ETHERNET SWITCH 3PORT 64LQFP |
| KSZ8893FQL | IC SWITCH FAST ETH 3PORT 128PQFP |
| KSZ8895MQI | IC ETHERNET SWITCH 5PORT 128PQFP |
| KSZ8895MQ | IC ETHERNET SW 5PORT 128-PQFP |
| KSZ8993FL | IC CONV MED 10/100 SGL 128PQFP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KSZ8873MML | 功能描述:以太網(wǎng) IC 3-Port Fast Ethernet Switch with 2x MII Interface, Lead Free RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| KSZ8873MML-EVAL | 功能描述:以太網(wǎng)開發(fā)工具 3-Port Fast Ethernet Switch with 2x MII Interface - Evaluation Board RoHS:否 制造商:Micrel 產(chǎn)品:Evaluation Boards 類型:Ethernet Transceivers 工具用于評估:KSZ8873RLL 接口類型:RMII 工作電源電壓: |
| KSZ8873MMLI | 功能描述:以太網(wǎng) IC 3-Port Fast Ethernet Switch with 2x MII Interface (Industrial Grade) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| KSZ8873RLL | 功能描述:以太網(wǎng) IC 3-Port Fast Ethernet Switch with 1x RMII Interface, Lead Free RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| KSZ8873RLL-EVAL | 功能描述:以太網(wǎng)開發(fā)工具 3-Port Fast Ethernet Switch with 1x RMII Interface - Evalaution Board RoHS:否 制造商:Micrel 產(chǎn)品:Evaluation Boards 類型:Ethernet Transceivers 工具用于評估:KSZ8873RLL 接口類型:RMII 工作電源電壓: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。