參數(shù)資料
型號(hào)： MVTX2601AG
廠商： ZARLINK SEMICONDUCTOR INC
元件分類： 網(wǎng)絡(luò)接口
英文描述： Unmanaged 24-Port 10/100 Mbps Ethernet Switch
中文描述： DATACOM, LAN SWITCHING CIRCUIT, PBGA553
封裝： 37.50 X 37.50 MM, 2.33 MM HEIGHT, MS-034, HSBGA-553
文件頁(yè)數(shù)： 20/91頁(yè)
文件大小： 686K
代理商： MVTX2601AG
MVTX2601
Data Sheet
20
Zarlink Semiconductor Inc.
Figure 8 - Memory Configuration for 1 Bank, 1 Layer, 2 MB
6.0 Frame Engine
6.1 Data Forwarding Summary
When a frame 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 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 are four TxSch Q for each 10/100, 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
older HOL between the two queues goes first. For 10/100 ports multicast queue 0 is associated with unicast queue
0 and multicast queue 1 is associated with unicast queue 2.
The TxDMA will pull frame data from the memory and forward it granule-by-granule to the MAC TxFIFO of the
destination port.
Memory
256 K
32 bits
SRAM
Memory
256 K
32 bits
Data LA_D[63:32]
Data LA_D[31:0]
Address LA_A[20:3]
Bank A (2 M One Layer)
Bootstraps: TSTOUT7 = Pull Down, TSTOUT13 = Open, TSTOUT4 = Open
相關(guān)PDF資料
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MVTX2604 Managed 24-Port 10/100 Mb + 2 Port 1 Gb Ethernet Switch
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MVTX2601AG2 制造商:Microsemi Corporation 功能描述:
MVTX2602 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Managed 24 Port 10/100 Mbps Ethernet Switch
MVTX2602A 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MVTX260x Port Mirroring
MVTX2602AG 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Managed 24 Port 10/100 Mbps Ethernet Switch
MVTX2602AG2 制造商:Microsemi Corporation 功能描述:
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