參數(shù)資料
型號(hào): MT90503AG
廠商: ZARLINK SEMICONDUCTOR INC
元件分類(lèi): 數(shù)字傳輸電路
英文描述: CLIP, STRAIN RELIEF, 50WAY; For use with:820 Series Tripolarized Wiremount Sockets; Ways, No. of:50; Material:Metal; Connector type:Strain Relief RoHS Compliant: Yes
中文描述: ATM SEGMENTATION AND REASSEMBLY DEVICE, PBGA503
封裝: 40 X 40 MM, 2.33 MM HEIGHT, PLASTIC, MS-034, BGA-503
文件頁(yè)數(shù): 62/233頁(yè)
文件大?。?/td> 1341K
代理商: MT90503AG
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MT90503
Data Sheet
62
Zarlink Semiconductor Inc.
Figure 25 - Unsyncrhonised Schedulers
Figure 26 - Synchronised Schedulers
Figure 27 - Partially Synchronised Schedulers
4.3.3 Out of Bandwidth Error
The TX_SAR out-of-bandwidth error indicates that a particular region of the scheduler, or the scheduler as a whole,
is overloaded. This error occurs when the TX_SAR lagging by F frames or more, where F is an integer written to
register 0608h. The TX_SAR has 125
μ
s to execute all the events in the frame it is servicing at the current time. If
all the events in the frame are not executed within 125
μ
s, the TX_SAR continues until the end of the current frame
before moving on to events in the next frame. This method reduces the amount of time it has to service the
following frame. If the first frame took 150
μ
s to service, then there would only be 100
μ
s left to service the following
frame. Therefore, if the second frame is also very full, the TX_SAR would not have the time to finish servicing it and
will be late again for the following frame.
If frames take an excessively long time to service, the MT90503 may become several frames late. If the MT90503
detects that it is F or more frames late, an out-of-bandwidth error will be declared and the MT90503 will skip the
next F frames of events. This action will cause latency in the transmission delay and corrupt data on the VCs until
the channel reconverges. The channel reconverges once every 375 frames (47 ms) in “AAL1 with pointer”
schedulers, and less often if multiframing is used. The cells that were supposed to be assembled in the F missing
frames are skipped, and new cells are assembled with the old data. The out-of-bandwidth error arises from an error
21 Events
9 Events
Scheduler 1
Frame 1
Frame 0
26 Events
15 Events
32 Events
Scheduler 0
Frame 0
Frame 2
Frame 1
23 Events
6 Events
Scheduler 0
Frame 1
Frame 0
17 Events
24 Events
Scheduler 1
Frame 1
Frame 0
Frame 1
Frame 0
20 Events
27 Events
Scheduler 0
Frame 1
Frame 0
5 Events
12 Events
Frame 3
Frame 2
16 Events
7 Events
Scheduler 1
相關(guān)PDF資料
PDF描述
MT90520 8-Port Primary Rate Circuit Emulation AAL1 SAR
MT90520AG 8-Port Primary Rate Circuit Emulation AAL1 SAR
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MT9072AV Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MT90520 制造商:ZARLINK 制造商全稱(chēng):Zarlink Semiconductor Inc 功能描述:8-Port Primary Rate Circuit Emulation AAL1 SAR
MT90520AG 制造商:Microsemi Corporation 功能描述:ATM SAR 2.048MBPS 2.5V CBR 456BGA - Trays
MT90520AG2 制造商:Microsemi Corporation 功能描述:ATM SAR 2.048MBPS 2.5V CBR 456BGA - Trays 制造商:Zarlink Semiconductor Inc 功能描述:ATM SAR 2.048MBPS 2.5V CBR 456BGA - Trays
MT90528 制造商:ZARLINK 制造商全稱(chēng):Zarlink Semiconductor Inc 功能描述:28-Port Primary Rate Circuit Emulation AAL1 SAR
MT90528AG 制造商:ZARLINK 制造商全稱(chēng):Zarlink Semiconductor Inc 功能描述:28-Port Primary Rate Circuit Emulation AAL1 SAR