Features
 High Performance Non-Blocking Switch Architecture
– 32-lane 8-port PCIe switch
• Four x8 switch ports each of which can bifurcate to two x4
ports (total of eight x4 ports)
– Integrated SerDes supports 5.0 GT/s Gen2 and 2.5 GT/s Gen1 operation
– Delivers up to 32 GBps (256 Gbps) of switching capacity
– Supports 128 Bytes to 2 KB maximum payload size
– Low latency cut-through architecture
– Supports one virtual channel and eight traffic classes
 Standards and Compatibility
– PCI Express Base Specification 2.0 compliant
– Implements the following optional PCI Express features
• Advanced Error Reporting (AER) on all ports
• End-to-End CRC (ECRC)
• Access Control Services (ACS)
• Power Budgeting Enhanced Capability
• Device Serial Number Enhanced Capability
• Sub-System ID and Sub-System Vendor ID Capability
• Internal Error Reporting ECN
• Multicast ECN
• VGA and ISA enable
• L0s and L1 ASPM
• ARI ECN
 Port Configurability
– x4 and x8 ports
• Ability to merge adjacent x4 ports to create a x8 port
– Automatic per port link width negotiation (x8 → x4 → x2 → x1)
– Crosslink support
– Automatic lane reversal
– Autonomous and software managed link width and speed control
– Per lane SerDes configuration
• De-emphasis
• Receive equalization