89HPES4T4

4-Lane 4-Port PCI Express® Switch ® 89HPES4T4 Data Sheet Device Overview The 89HPES4T4 is a member of IDT’s PRECISE™ family of PCI Express switching solutions. The PES4T4 is a 4-lane, 4-port peripheral chip that performs PCI Express Base switching. It provides connectivity and switching functions between a PCI Express upstream port and up to four downstream ports and supports switching between downstream ports. Features  High Performance PCI Express Switch – Four 2.5 Gbps PCI Express lanes – Four switch ports – x1 Upstream port – Three x1 Downstream ports – Low latency cut-through switch architecture – Support for Max payload sizes up to 256 bytes – One virtual channel – Eight traffic classes – PCI Express Base Specification Revision 1.1 compliant  Flexible Architecture with Numerous Configuration Options – Automatic lane reversal on all ports – Automatic polarity inversion on all lanes – Ability to load device configuration from serial EEPROM  Legacy Support – PCI compatible INTx emulation – Bus locking  Highly Integrated Solution – Requires no external components – Incorporates on-chip internal memory for packet buffering and queueing – Integrates four 2.5 Gbps embedded SerDes with 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 and Advanced Error ...