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PM9313 Datasheet(PDF) 11 Page - PMC-Sierra, Inc

Part # PM9313
Description  ENHANCED TT1??SWITCH FABRIC
PDF  343 Pages
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Manufacturer  PMC [PMC-Sierra, Inc]
Direct Link  http://www.pmc-sierra.com
Logo PMC - PMC-Sierra, Inc

PM9313 Datasheet(HTML) 11 Page - PMC-Sierra, Inc

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PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
vii
PM9311/2/3/5 ETT1™ CHIP SET
PMC-2000164
ISSUE 3
ENHANCED TT1™ SWITCH FABRIC
Released
Data Sheet
PMC-Sierra, Inc.
Figure 1.
The Basic Components of a Switch Built Around the ETT1 Chip Set. . . . .... ... ... ... .. 16
Figure 2.
ETT1 Switch Core Logical Interconnects ... ... ... ... .... ... ... ... .... ... ... ... .. 18
Figure 3.
TwoPortConfiguration ofa ETT1 Switch .. ... ... ... .... ... ... ... .... ... ... ... .. 20
Figure 4.
Queueing andFlowControl ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... .. 22
Figure 5.
TheTDM Frame Concept . ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... .. 23
Figure 6.
Fully Redundant Core . . . . . . . . . . .... ... ... ... ... .... ... ... ... .... ... ... ... .. 26
Figure 7.
Simple Redundant Scheduler Configuration . . . . . . . . . .... ... ... ... .... ... ... ... .. 27
Figure 8.
LCS Cell SlicedAcross Dataslices and Crossbars . ... .... ... ... ... .... ... ... ... .. 29
Figure 9.
TheUnicast Ingress Queueing Model for One Port . ... .... ... ... ... .... ... ... ... .. 31
Figure 10. Ingress andEgress Queue for Multicast Traffic . ... ... .... ... ... ... .... ... ... ... .. 33
Figure 11. An ETT1 Port Operatingin SubportMode with Four OC-48c Linecards . .... ... ... ... .. 34
Figure 12. The InputRequestCounters . . ... .... ... ... ... ... .... ... ... ... .... ... ... ... .. 35
Figure 13. Full Set of Counters for a SinglePriority ... ... ... ... .... ... ... ... .... ... ... ... .. 36
Figure 14. All RequestCounters for a SingleOutput Share a Single Queue ... ... .... ... ... ... .. 38
Figure 15. Sequenceof Events atthe InputSide . . ... ... ... ... .... ... ... ... .... ... ... ... .. 40
Figure 16.
Virtual Input Queues . . ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... .. 43
Figure 17. The Four Priorities .... ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... .. 45
Figure 18. Scheduler Requests/Grants are Multiplexed ata Port Level . ... ... ... .... ... ... ... .. 46
Figure 19. Each iEPP has a Single Virtual Output Queuefor MulticastCells ... ... .... ... ... ... .. 47
Figure 20. Multicast Cell Processing .. ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... .. 47
Figure 21. EITIBM structure . .... ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... .. 48
Figure 22. OITIBM structure . .... ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... .. 49
Figure 23. Scheduler Priorities ... ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... .. 50
Figure 24. ETT1 Port Ingress Queues ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... .. 51
Figure 25. A Separate Crossbar is Used to Convey Backpressure Information to the iEPPs. . . . . . . . . 53
Figure 26. The Queueing Structure. . . . . . . . . .... ... ... ... ... .... ... ... ... .... ... ... ... .. 55
Figure 27. Ingress Port Logic .... ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... .. 57
Figure 28. The oEPP Must Treat the Transferred TDM Cellas a Multicast Cell. ... .... ... ... ... .. 58
Figure 29. SingleTDM Table .... ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... .. 59
Figure 30. TDM Synchronization.. ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... .. 60
Figure 31. SignalFlow... ... .... ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... .. 62
Figure 32. One Implementation: The OOB Bus Consists of Both Local and Global Buses . . . . . . . . . . 77
Figure 33. The Global Device Select Defines the Board Number and the Device on Each Board . . . . . 80
Figure 34. Write Cycle - No Wait.. ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... .. 82
Figure 35. Write Cycle - OneWait. ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... .. 82
Figure 36. ReadCycle - One Wait ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... .. 83
Figure 37. ReadCycle - Two Waits... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... .. 83
Figure 38. Interrupts are Active High and Synchronous ... ... ... .... ... ... ... .... ... ... ... .. 84
Figure 39. Redundant Connections . . . . . . . . .... ... ... ... ... .... ... ... ... .... ... ... ... .. 92
Figure 40. SimpleNon-Redundant Crossbar Configuration ... ... .... ... ... ... .... ... ... ... .. 93
Figure 41. SimpleNon-Redundant Scheduler Configuration . . ... .... ... ... ... .... ... ... ... .. 95



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