參數(shù)資料
型號： MVTX2804AG
廠商： ZARLINK SEMICONDUCTOR INC
元件分類： 網(wǎng)絡(luò)接口
英文描述： 8-Port 1000 Mbps Ethernet Distributed Switch
中文描述： DATACOM, LAN SWITCHING CIRCUIT, PBGA596
封裝： 40 X 40 MM, 2.33 MM HEIGHT, MS-034, HSBGA-596
文件頁數(shù)： 22/174頁
文件大?。?/td> 2249K
代理商： MVTX2804AG
MVTX2804
Data Sheet
22
Zarlink Semiconductor Inc.
2.6.1 Write Command
2.6.2 Read Command
All registers in the MVTX2804 can be modified through this synchronous serial interface.
3.0 Data Forwarding Protocol
3.1 Unicast Data Frame Forwarding
When a frame arrives, it is assigned a handle in memory by the Frame Control Buffer Manager (FCB Manager).
An FCB handle will always be available, because of advance buffer reservations.
The memory (ZBT-SRAM) interface is two 64-bit buses, connected to two ZBT-SRAM domains, A and B. The
Receive DMA (RxDMA) is responsible for multiplexing the data and the address. On a port's “turn,” the RxDMA
will move 8 bytes (or up to the end-of-frame) from the port's associated RxFIFO into memory (Frame Data
Buffer, or FDB).
Once an entire frame has been moved to the FDB, and a good end-of-frame (EOF) has been received, the Rx
interface makes a switch request. The RxDMA arbitrates among multiple switch requests.
The switch request consists of the first 64 bytes of a frame, containing among other things, the source and
destination MAC addresses of the frame. The search engine places a switch response in the switch response
queue of the frame engine when done. Among other information, the search engine will have resolved the
destination port of the frame and will have determined that the frame is unicast.
After processing the switch response, the Transmission Queue Manager (TxQ manager) of the frame engine is
responsible for notifying the destination port that it has a frame to forward to it. But first, the TxQ manager has
to decide whether or not to drop the frame, based on global FDB reservations and usage, as well as TxQ
PS-STROBE-
PS_DI
A0
A2
...
A9
A10
A11
A1
W
D0
D1
D2
D3
D4
D5
D6
D7
START
ADDRESS
COMMAND
DATA
2 Extra clocks after last
transfer
PS_STROBE-
PS_DI
PS_DO
A0
A1
A2
...
A9
A10
A11
R
D0
D1
D2
D3
D4
D5
D6
D7
START
ADDRESS
COMMAND
DATA
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MVTX2804AG2 制造商:Microsemi Corporation 功能描述:
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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
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