89HPES12T3G2 Datasheet | IDT

Overview The 89HPES12T3G2 is a member of IDT’s PRECISE™ family of PCI Express® switching solutions. The PES12T3G2 is a 12-lane, 3-port Gen2 peripheral chip that performs PCI Express Base switching with a feature set optimized for high performance applications such as servers, storage, and munications/networking. It provides connectivity and switching functions between a PCI Express upstream port and two downstream ports and supports switching between downstream ports. 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 pliant - 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 - Features Block Diagram 3-Port Switch Core / 12 PCI Express Lanes Frame Buffer Route Table Port Arbitration Scheduler Transaction Layer Data Link Layer Transaction Layer Data Link Layer Transaction Layer Data Link Layer Multiplexer / Demultiplexer Phy Logical Layer Multiplexer / Demultiplexer Phy Logical Layer Multiplexer / Demultiplexer Phy Logical Layer Ser Des Ser Des Ser Des (Port 0) (Port 2) Figure 1 Internal Block Diagram (Port 4) IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc. 1 of 31 © 2007 Integrated Device Technology, Inc. - Notice: The information in this document is subject to change without...