89HPES12NT3 Datasheet | IDT

Overview The 89HPES12NT3 is a member of the IDT PRECISE™ family of PCI Express® switching solutions offering the next-generation I/O interconnect standard. The PES12NT3 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 high-performance I/O connectivity and switching functions between a PCIe® upstream port, a transparent downstream port, and a non-transparent downstream port. With non-transparent bridging (NTB) functionality, the PES12NT3 can be used standalone or as a chipset with IDT PCIe System Interconnect Switches in multi-host and intelligent I/O applications such as munications, storage, and blade servers where inter-domain munication is required. Features - High Performance PCI Express Switch - Twelve PCI Express lanes (2.5Gbps), three switch ports - Delivers 48 Gbps (6 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 pliant Flexible Architecture with Numerous Configuration Options - Port arbitration schemes utilizing round robin - Supports automatic per port link width negotiation (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 munication - Thirty-two inbound and outbound doorbells - Four inbound and outbound message registers - Two shared scratchpad registers - Allows up to sixteen masters to municate...