Features
◆ High Performance PCI Express Switch
– Eight PCI Express lanes (2.5Gbps), two switch ports
– Delivers 32 Gbps (4 GBps) of aggregate switching capacity
– Low latency cut-through switch architecture
– Support for Max Payload size up to 2048 bytes
– Supports one virtual channel and eight traffic classes
– PCI Express Base specification Revision 1.0a compliant
◆ Flexible Architecture with Numerous Configuration Options
– Supports automatic per port link width negotiation (x8, x4, x2,
or x1)
– Static lane reversal on all ports
– Automatic polarity inversion on all lanes
– Supports locked transactions, allowing use with legacy software
– Ability to load device configuration from serial EEPROM
– Ability to control device via SMBus
◆ Non-Transparent Port
– Crosslink support on NTB port
– Four mapping windows supported
• Each may be configured as a 32-bit memory or I/O window
• May be paired to form a 64-bit memory window
– Interprocessor communication
• Thirty-two inbound and outbound doorbells
• Four inbound and outbound message registers
• Two shared scratchpad registers
– Allows up to sixteen masters to communicate through the nontransparent port
– No limit on the number of supported outstanding transactions
through the non-transparent bridge
– Completely symmetric non-transparent bridge operation
allows similar/same configuration software to be run
– Supports direct connection to a transparent or non-transparent
port of another switch
◆ Highly Integrated Solution
– Requires no external components
– Incorporates on-chip internal memory for packet buffering and
queueing
– Integrates eight 2.5 Gbps embedded full duplex SerDes, 8B/
10B encoder/decoder (no separate transceivers needed)