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Notes
PES48H12G2 User Manual
®
Introduction .................................................................................................................................... 1
Content Summary .......................................................................................................................... 1
Signal Nomenclature ..................................................................................................................... 2
Numeric Representations .............................................................................................................. 2
Data Units ...................................................................................................................................... 2
Register Terminology ..................................................................................................................... 3
Use of Hypertext ............................................................................................................................ 5
Reference Documents ................................................................................................................... 5
Revision History ............................................................................................................................. 5
Introduction ..................................................................................................................................... 1-1
Features.......................................................................................................................................... 1-1
Logic Diagram................................................................................................................................. 1-5
System Identification....................................................................................................................... 1-6
Vendor ID................................................................................................................................ 1-6
Device ID ................................................................................................................................ 1-6
Revision ID ............................................................................................................................. 1-6
JTAG ID .................................................................................................................................. 1-6
SSID/SSVID............................................................................................................................ 1-6
Device Serial Number Enhanced Capability........................................................................... 1-6
Pin Description................................................................................................................................ 1-7
Pin Characteristics ........................................................................................................................1-13
Introduction ..................................................................................................................................... 2-1
Switch Partitioning ..........................................................................................................................2-2
Dynamic Reconfiguration................................................................................................................ 2-3
Introduction ..................................................................................................................................... 3-1
Switch Core Architecture ................................................................................................................ 3-1
Ingress Buffer .........................................................................................................................3-1
Egress Buffer ..........................................................................................................................3-2
Crossbar Interconnect ............................................................................................................ 3-3
Datapaths ............................................................................................................................... 3-3
Packet Ordering .............................................................................................................................. 3-4
Arbitration........................................................................................................................................ 3-5
Port Arbitration........................................................................................................................ 3-6
Cut-Through Routing ...................................................................................................................... 3-6
Request Metering............................................................................................................................ 3-8
Operation.............................................................................................................................. 3-10
Completion Size Estimation.................................................................................................. 3-12
Internal Errors ............................................................................................................................... 3-13
Switch Time-Outs ................................................................................................................. 3-14
Memory SECDED ECC Protection ....................................................................................... 3-14
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April 5, 2013
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