89HPES12N3 Datasheet | Renesas

Overview The 89HPES12N3 is a member of IDT’s PRECISE™ family of PCI Express® switching solutions. The PES12N3 is a 12-lane, 3-port 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 PCIe® upstream port and two downstream ports or peer-to-peer switching between downstream ports. Features - High Performance PCI Express Switch - Three x4 ports with 12 PCI Express lanes total - Delivers 6 GBps (48 Gbps) aggregate switching capacity - Low latency cut-through switch architecture - Supports 128 to 2048 byte maximum payload size - Supports one virtual channel - PCI Express Base specification Revision 1.0a pliant - Flexible Architecture with Numerous Configuration Options - Port arbitration schemes utilizing round robin or weighted round robin algorithms - Supports automatic per port link with negotiation (x4, x2, or x1) - Supports static lane reversal on all ports - Supports polarity inversion - Supports locked transactions, allowing use with legacy software - Ability to load device configuration from serial EEPROM Block Diagram - Highly Integrated Solution - Requires no external ponents - Incorporates on-chip internal memory for packet buffering and queueing - Integrates 12 2.5 Gbps embedded Ser Des, 8B/10B encoder/ decoder (no separate transceivers needed) - Reliability, Availability, and Serviceability (RAS) Features - 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 ECRC passed through - Supports PCI Express Native Hot-Plug - patible with Hot-Plug I/O expanders used on PC motherboards - Supports Hot-Swap - Power Management - Supports PCI Power Management Interface specification, Revision 1.1 (PCI-PM) - Unused Ser Des are disabled - Supports Advanced Configuration and Power Interface Speci-...