Features
◆ High Performance PCI Express Switch
– Twelve 5 Gbps Gen2 PCI Express lanes
– Three switch ports
• One x4 upstream port
• Two x4 downstream ports
– Low latency cut-through switch architecture
– Support for Max Payload Size up to 2048 bytes
– One virtual channel
– Eight traffic classes
– PCI Express Base Specification Revision 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
• VGA and ISA enable
• L0s and L1 ASPM
• ARI ECN
◆ Flexible Architecture with Numerous Configuration Options
– Automatic per port link width negotiation to x4, x2 or x1
– Automatic lane reversal on all ports
– Automatic polarity inversion
– Ability to load device configuration from serial EEPROM
◆ On-Die Temperature Sensor
– Range of 0 to 127.5 degrees Celsius
– Three programmable temperature thresholds with over and
under temperature threshold alarms
– Automatic recording of maximum high or minimum low
temperature
◆ Legacy Support
– PCI compatible INTx emulation
– Bus locking
◆ Highly Integrated Solution
– Incorporates on-chip internal memory for packet buffering and
queueing