PXF4336 Datasheet, PDF (11/425 Pages) Infineon Technologies AG – ABM Premium ATM Buf fer Manager

ABM-P
PXF 4336 V1.1
List of Figures
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Logic Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
General System Integration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Pin Configuration (Bottom View) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Pin Configuration (Bottom View) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Sub-System Integration Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Logical Block Diagram (One Direction) . . . . . . . . . . . . . . . . . . . . . . . . 48
LCI Building Patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
LCI Building Patterns (VPI only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Clocking System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
DPLL Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Reset System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
ABM-P in Bi-directional Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
ABM-P in Uni-directional Mode Using both Cores . . . . . . . . . . . . . . . . 61
ABM-P in Uni-directional Mode Using one Core . . . . . . . . . . . . . . . . . 62
Connection Identifiers in Mini-Switch Configuration. . . . . . . . . . . . . . . 63
Cell Acceptance and Scheduling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Buffer Manager Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Queue Assignment to Traffic Classes and Scheduler Blocks . . . . . . . 67
Buffer Management with per Queue Minimum Buffer Reservation . . . 75
Buffer Threshold with Hysteresis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Functional Structure of the Hierarchical Queue Scheduler . . . . . . . . . 81
Scheduler Block Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Behavior of Different Scheduler Types . . . . . . . . . . . . . . . . . . . . . . . . 83
Scheduler Behavior Example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Shaping and Policing at Network Boundaries . . . . . . . . . . . . . . . . . . . 86
Ideal ABM-P Shaper Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Ideal and Real ABM-P Shaper Output . . . . . . . . . . . . . . . . . . . . . . . . . 88
VC Merge Scheduling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Scheduler Block Usage at Switch Output . . . . . . . . . . . . . . . . . . . . . . 93
Scheduler Block Usage at Switch Input . . . . . . . . . . . . . . . . . . . . . . . . 94
User and RM Cell Flows of an ABR Connection . . . . . . . . . . . . . . . . . 96
Source Behavior of an Explicit Rate controlled ABR Connection . . . . 97
Example Network Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
ACR calculation at BRM Cell Receive . . . . . . . . . . . . . . . . . . . . . . . . 102
ACR calculation at FRM Cell Send . . . . . . . . . . . . . . . . . . . . . . . . . . 103
RM and User Cell Sequence: General Case . . . . . . . . . . . . . . . . . . . 104
RM and User Cell Sequence: Worst Case. . . . . . . . . . . . . . . . . . . . . 104
ABR Mechanisms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Reactive Switch Control Example . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Distribution of VS/VD Function in a Switch . . . . . . . . . . . . . . . . . . . . 109
ERC Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Data Sheet
11
2001-12-17