89HPES12N3A Datasheet | IDT

Overview The 89HPES12N3A, a 12 lane 3-port PCI Express® switch, is a member of the IDT PRECISE™ family of PCI Express switching solutions. The PES12N3A is a peripheral chip that performs PCI Express Packet switching with a feature set optimized for high performance applications such as servers and storage. It provides connectivity and switching functions between a PCI Express upstream port and two downstream ports or peer-to-peer switching between downstream ports. The 89HPES12N3A offers an enhanced architecture and feature set in a package that is pin-patible with the first generation 89HPES12N3 12-lane, 3-port PCIe switch. Features - High Performance PCI Express Switch - Twelve 2.5Gbps PCI Express lanes - Three switch ports - Upstream port configurable up to x4 - Downstream ports configurable up to x4 - Low-latency cut-through switch architecture - Support for Max Payload Sizes up to 2048 bytes - One virtual channel - Eight traffic classes - PCI Express Base Specification Revision 1.1 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 on all lanes - Ability to load device configuration from serial EEPROM - Legacy Support - PCI patible INTx emulation - Bus locking - Highly Integrated Solution - Requires no external ponents - Incorporates on-chip internal memory for packet buffering and queueing - Integrates twelve 2.5 Gbps embedded Ser Des with 8B/10B encoder/decoder (no separate transceivers needed) - Reliability, Availability, and Serviceability (RAS) Features - Supports ECRC and Advanced Error Reporting - Internal end-to-end parity protection on all TLPs ensures data integrity even in systems that do not implement end-to-end CRC (ECRC) - Supports PCI Express Native Hot-Plug, Hot-Swap capable I/O - patible with Hot-Plug I/O expanders used on PC and server motherboards - Block Diagram 3-Port Switch Core Frame Buffer...