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參數(shù)資料
| 型號： | 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)交換機分布式 |
| 文件頁數(shù)： | 36/174頁 |
| 文件大?。?/td> | 2249K |
| 代理商： | MVTX2804 |
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MVTX2804
Data Sheet
36
Zarlink Semiconductor Inc.
The search engine retrieves the VLAN member ports from the VLAN index table, which consists of 4K entries.
The search engine retrieves the VLAN member ports from the ingress port's VLAN map. Based on the
destination MAC address, the search engine determines the egress port from the MCT database. If the egress
port is a member of a trunk group, the packet can be distributed to the other members of that trunk group. The
VLAN map is used to check whether the egress port is a member of the VLAN, based on the ingress port. If it is
a member, the packet is forwarded otherwise it is discarded.
8.3 Multicast Packet Forwarding
For multicast packet forwarding, the device must determine the proper set of ports from which to transmit the
packet based on the VLAN index and hash key.
Two functions are required in order to distribute multicast packets to the appropriate destination ports in a port
trunking environment.
Determining one forwarding port per group.
For multicast packets, all but one port per group, the forwarding port, must be excluded.
8.4 Preventing Multicast Packets from Looping Back to the Source Trunk
The search engine needs to prevent a multicast packet from sending to a port that is in the same trunk group
with the source port. This is because, when we select the primary forwarding port for each group, we do not
take the source port into account. To prevent this, we simply apply one additional filter, so as to block that
forwarding port for this multicast packet.
9.0 LED Interface
9.1 Introduction
The MVTX2804 LED block provides two interfaces: a serial output channel, and a parallel time-division
interface. The serial output channel provides port status information from the MVTX2804 chip in a continuous
serial stream. This means that a low cost external device must be used to decode the serial data and to drive an
LED array for display.
By contrast, the parallel time-division interface supports a glueless LED module. Indeed, the parallel interface
can directly drive low-current LEDs without any extra logic. The pin LED_PM is used to select serial or parallel
mode.
For some LED signals, the interface also provides a blinking option. Blinking may be enabled for LED signals
TxD, RxD, COL, and FC (to be described later). The pin LED_BLINK is used to enable blinking, and the blinking
frequency is around 160 ms.
9.2 Serial Mode
In serial mode, the following pins are utilized:
LED_SYNCO - a sync pulse that defines the boundary between status frames
LED_CLKO - the clock signal
LED_DO - a continuous serial stream of data for all status LEDs that repeats once every frame time
In each cycle (one frame of status information, or one sync pulse), 16x8 bits of data are transmitted on the
LED_DO signal. The sequence of transmission of data bits is as shown in the figure below:
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相關代理商/技術參數(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 觸點電鍍:Tin over Nickel 觸點材料: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 觸點電鍍:Tin over Nickel 觸點材料: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™ 標準包裝: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:- 顏色:黃 包裝:散裝 觸點表面涂層:錫 觸點材料: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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