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參數(shù)資料
| 型號： | MVTX2603 |
| 廠商： | Zarlink Semiconductor Inc. |
| 英文描述： | Unmanaged 24-Port 10/100 Mb + 2-Port 1 Gb Ethernet Switch |
| 中文描述： | 非托管的24端口的10/100 Mb 2端口千兆以太網(wǎng)交換機1 |
| 文件頁數(shù)： | 15/109頁 |
| 文件大?。?/td> | 803K |
| 代理商： | MVTX2603 |
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MVTX2603
Data Sheet
15
Zarlink Semiconductor Inc.
During scheduling, the TxQ manager treats the unicast queue and the multicast queue of the same class as one
logical queue. The older head of line of the two queues is forwarded first.
The port control requests a FCB release only after the EOF for the multicast frame has been read by all ports to
which the frame is destined.
4.0 Memory Interface
4.1 Overview
The MVTX2603 provides two 64-bit wide SRAM banks, SRAM Bank A and SRAM Bank B, with a 64-bit bus
connected to each. Each DMA can read and write from both bank A and bank B. The following figure provides an
overview of the MVTX2603 SRAM banks.
Figure 5 - MVTX2603 SRAM Interface Block Diagram (DMAs for 10/1000 Ports Only)
4.2 ZBT Support
The MVTX2603 supports Zero Bus Turnaround (ZBT). ZBT is a synchronous SRAM architecture that is optimized
for networking and telecommunications applications. It can significantly increase the switch’s internal bandwidth
when compared to standard Pipeline SyncBurst SRAM.
The ZBT architecture is optimized for switching and other applications with highly random READs and WRITEs.
ZBT SRAMs eliminate all idle cycles when turning the data bus around from a WRITE operation to a READ
operation (or vice versa). This feature results in dramatic performance improvements in systems that have such
traffic patterns (that is, frequent and random read and write access to the SRAM).
Please refer to the ZBT Application Note for further details.
4.3 Detailed Memory Information
Because the bus for each bank is 64-bits wide, frames are broken into 8-byte granules, written to and read from
memory. The first 8-byte granule gets written to Bank A, the second 8-byte granule gets written to Bank B, and so
on in alternating fashion. When reading frames from memory, the same procedure is followed, first from A, then
from B and so on.
SRAM Bank A
TXDMA
0-7
TXDMA
8-15
TXDMA
16-23
RXDMA
0-7
RXDMA
8-15
RXDMA
16-23
SRAM Bank B
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MVTX2603AG | Unmanaged 24-Port 10/100 Mb + 2-Port 1 Gb Ethernet Switch |
| MVTX2604 | Managed 24-Port 10/100 Mb + 2 Port 1 Gb Ethernet Switch |
| MVTX2604AG | Managed 24-Port 10/100 Mb + 2 Port 1 Gb Ethernet Switch |
| MVTX2801 | Unmanaged 4-Port 1000 Mbps Ethernet Switch |
| MVTX2801AG | Unmanaged 4-Port 1000 Mbps Ethernet Switch |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MVTX2603A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Unmanaged 24 port 10/100Mb + 2 port 1Gb Ethernet switch |
| MVTX2603AG | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Unmanaged 24-Port 10/100 Mb + 2-Port 1 Gb Ethernet Switch |
| MVTX2603AG2 | 制造商:Microsemi Corporation 功能描述: |
| MVTX2604 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Managed 24-Port 10/100 Mb + 2 Port 1 Gb Ethernet Switch |
| MVTX2604A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MVTX260x Physical Port Control |
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