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參數(shù)資料
| 型號(hào)： | MVTX2804 |
| 廠商： | Zarlink Semiconductor Inc. |
| 英文描述： | 8-Port 1000 Mbps Ethernet Distributed Switch |
| 中文描述： | 8端口1000 Mbps以太網(wǎng)交換機(jī)分布式 |
| 文件頁數(shù)： | 27/174頁 |
| 文件大?。?/td> | 2249K |
| 代理商： | MVTX2804 |
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MVTX2804
Data Sheet
27
Zarlink Semiconductor Inc.
VLAN STATUS [2:0]
000:Not a valid entry
001:Blocking status, no RX and TX
010:Not a VLAN member, spanning tree learn status
011:VLAN member, spanning tree learn status
100:Not a VLAN member, spanning tree forward status
101:VLAN member and is subject to aging, spanning tree forward status (Don't use)
110:VLAN member and is subject to aging, spanning tree forward status
111:VLAN member and is not subject to aging, spanning tree forward status
CPU can create static VLAN port by writing the static status to the VLAN- PORT status entry.
Dynamic VLAN and Port association can be created by writing “110” to the VLAN STATUS. Hardware will age
and refresh the entry based on the VLAN - PORT activity. When the VLAN - PORT is ready to be aged out, a
message is sent to CPU and CPU can remove the VLAN - PORT association by writing “000” to the VLAN
STATUS. As a result, the VLAN and PORT are no long associated and the VLAN domain is shrunk.
6.0 Frame Engine
6.1 Data Forwarding Summary
Enters the device at the RxMAC, the RxDMA will move the data from the MAC RxFIFO to the FDB. Data is
moved in 8-byte granules in conjunction with the scheme for the SRAM interface.
A switch request is sent to the Search Engine. The Search Engine processes the switch request.
A switch response is sent back to the Frame Engine and indicates whether the frame is unicast or multicast,
and its destination port or ports. A VLAN table lookup is performed as well.
A Transmission Scheduling Request is sent in the form of a signal notifying the TxQ manager. Upon
receiving a Transmission Scheduling Request, the device will format an entry in the appropriate
Transmission Scheduling Queue (TxSch Q) or Queues. There is 8 transmission queues per Gigabit port,
one for each priority. Creation of a queue entry either involves linking a new job to the appropriate linked list
if unicast, or adding an entry to a physical queue if multicast.
When the port is ready to accept the next frame, the TxQ manager will get the head-of-line (HOL) entry of
one of the TxSch Qs, according to the transmission scheduling algorithm (so as to ensure per-class quality
of service). The unicast linked list and the multicast queue for the same port-class pair are treated as one
logical queue.
The TxDMA will pull frame data from the memory and forward it granule-by-granule to the MAC TxFIFO of
the destination port.
6.2 Frame Engine Details
This section briefly describes the functions of each of the modules of the MVTX2804 frame engine.
6.2.1 FCB Manager
The FCB manager allocates FCB handles to incoming frames, and releases FCB handles upon frame
departure. The FCB manager is also responsible for enforcing buffer reservations and limits. The default values
can be determined by referring to Chapter 8. In addition, the FCB manager is responsible for buffer aging, and
for linking unicast forwarding jobs to their correct TxSch Q. The buffer aging can be enabled or disabled by the
bootstrap pin and the aging time is defined in register FCBAT.
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| MVTX2804AG | 8-Port 1000 Mbps Ethernet Distributed Switch |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MVTX2804AG | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:8-Port 1000 Mbps Ethernet Distributed Switch |
| MVTX2804AG2 | 制造商:Microsemi Corporation 功能描述: |
| MVU10-10FBK | 功能描述:端子 D-10-1103K BS-33-10-P 85299 RoHS:否 制造商:AVX 產(chǎn)品:Junction Box - Wire to Wire 系列:9826 線規(guī):26-18 接線柱/接頭大小: 絕緣: 顏色:Red 型式:Female 觸點(diǎn)電鍍:Tin over Nickel 觸點(diǎn)材料:Beryllium Copper, Phosphor Bronze 端接類型:Crimp |
| MVU10-10FBX | 功能描述:端子 BLOCK FORK VNYL INS BTL BS-33-10-P RoHS:否 制造商:AVX 產(chǎn)品:Junction Box - Wire to Wire 系列:9826 線規(guī):26-18 接線柱/接頭大小: 絕緣: 顏色:Red 型式:Female 觸點(diǎn)電鍍:Tin over Nickel 觸點(diǎn)材料:Beryllium Copper, Phosphor Bronze 端接類型:Crimp |
| MVU10-10FBX-BOTTLE | 功能描述:CONN FORK BLOCK INSUL 50PC RoHS:是 類別:連接器，互連式 >> 端子 - 鏟形 系列:Scotchlok™ 標(biāo)準(zhǔn)包裝:1 系列:Scotchlok™ 端子類型:彈簧，壓接式 接線柱/接片尺寸:10 接線柱 寬度 - 外邊:0.320"（8.13mm） 長度 - 總體:1.030"（26.16mm） 安裝類型:自由懸掛 端子:壓接 線規(guī):10-12 AWG 絕緣體:絕緣 特點(diǎn):- 顏色:黃 包裝:散裝 觸點(diǎn)表面涂層:錫 觸點(diǎn)材料:銅，ETP 絕緣體直徑:0.250"（6.35mm） 材料 - 絕緣體:聚酰胺（PA），尼龍 長度 - 環(huán)心道末端:0.280"（7.11mm） 長度 - 末端:0.550"（13.97mm） 內(nèi)部舌簧打開:- 相關(guān)產(chǎn)品:TR-490-ND - HAND CRIMP TOOL RACHET 10-22 AWGTH-450-ND - TOOL HAND CRIMP 6-26AWGTR-482-ND - TOOL RATCHETING 10-22AWG CRIMP920099-R-ND - TOOL 10-22AWG SCOTCHLOK CRIMP 其它名稱:000511285879115112858791180611464373 |
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