89HPES8T5A 8-Lane 5-Port Data Sheet PCI Express Switch u Highly Integrated Solution Device Overview Requires no external components The 89HPES8T5A is a member of IDTs PRECISE family of PCI Incorporates on-chip internal memory for packet buffering and Express switching solutions. The PES8T5A is an 8-lane, 5-port periph- queueing eral chip that performs PCI Express Base switching. It provides connec- Integrates eight 2.5 Gbps embedded SerDes with 8B/10B tivity and switching functions between a PCI Express upstream port and encoder/decoder (no separate transceivers needed) up to four downstream ports and supports switching between down- u Reliability, Availability, and Serviceability (RAS) Features stream ports. Internal end-to-end parity protection on all TLPs ensures data integrity even in systems that do not implement end-to-end Features CRC (ECRC) u High Performance PCI Express Switch Supports ECRC and Advanced Error Reporting Eight 2.5Gbps PCI Express lanes Supports PCI Express Native Hot-Plug, Hot-Swap capable I/O Five switch ports Compatible with Hot-Plug I/O expanders used on PC mother- Upstream port is x4 boards u Downstream ports are x1 Power Management Low-latency cut-through switch architecture Utilizes advanced low-power design techniques to achieve low Support for Max Payload Sizes up to 256 bytes typical power consumption One virtual channel Supports PCI Power Management Interface specification (PCI- Eight traffic classes PM 1.2) PCI Express Base Specification Revision 1.1 compliant Unused SerDes are disabled. u Flexible Architecture with Numerous Configuration Options Supports Advanced Configuration and Power Interface Speci- fication, Revision 2.0 (ACPI) supporting active link state Automatic lane reversal on all ports u Testability and Debug Features Automatic polarity inversion on all lanes Ability to load device configuration from serial EEPROM Built in Pseudo-Random Bit Stream (PRBS) generator u Legacy Support Numerous SerDes test modes Ability to read and write any internal register via the SMBus PCI compatible INTx emulation Ability to bypass link training and force any link into any mode Bus locking Provides statistics and performance counters Block Diagram 5-Port Switch Core / 8 PCI Express Lanes Port Frame Buffer Route Table Scheduler Arbitration Transaction Layer Transaction Layer Transaction Layer Transaction Layer Transaction Layer Data Link Layer Data Link Layer Data Link Layer Data Link Layer Data Link Layer Mux / Demux Mux / Demux Mux / Demux Mux / Demux Mux / Demux Phy Phy Phy Phy Phy Logical Logical Logical Logical Logical Layer Layer Layer Layer Layer SerDes SerDes SerDes SerDes SerDes (Port 0) (Port 2) (Port 3) (Port 4) (Port 5) Figure 1 Internal Block Diagram IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc. 1 of 29 June 18, 2014IDT 89HPES8T5A Data Sheet u 11 General Purpose Input/Output Pins Each pin may be individually configured as an input or output Each pin may be individually configured as an interrupt input Some pins have selectable alternate functions u Packaged in a 15mm x 15mm 196-ball BGA with 1mm ball spacing Product Description Utilizing standard PCI Express interconnect, the PES8T5A provides the most efficient I/O connectivity solution for applications requiring high throughput, low latency, and simple board layout with a minimum number of board layers. It provides 3 GBps (24 Gbps) of aggregated, full-duplex switching capacity through 6 integrated serial lanes, using proven and robust IDT technology. Each lane provides 2.5 Gbps of bandwidth in both direc- tions and is fully compliant with PCI Express Base specification revision 1.1. The PES8T5A is based on a flexible and efficient layered architecture. The PCI Express layer consists of SerDes, Physical, Data Link and Trans- action layers in compliance with PCI Express Base specification Revision 1.1. The PES8T5A can operate either as a store and forward or cut-through switch and is designed to switch memory and I/O transactions. It supports eight Traffic Classes (TCs) and one Virtual Channel (VC) with sophisticated resource management to allow efficient switching for applications requiring additional narrow port connectivity. Processor Processor Memory North Memory Memory Memory Bridge South Bridge x4 PES8T5A x1 x1 x1 x1 GE GE 1394 GE LOM LOM Figure 2 I/O Expansion Application SMBus Interface The PES8T5A contains two SMBus interfaces. The slave interface provides full access to the configuration registers in the PES8T5A, allowing every configuration register in the device to be read or written by an external agent. The master interface allows the default configuration register values of the PES8T5A to be overridden following a reset with values programmed in an external serial EEPROM. The master interface is also used by an external Hot-Plug I/O expander. Six pins make up each of the two SMBus interfaces. These pins consist of an SMBus clock pin, an SMBus data pin, and 4 SMBus address pins. In the slave interface, these address pins allow the SMBus address to which the device responds to be configured. In the master interface, these address pins allow the SMBus address of the serial configuration EEPROM from which data is loaded to be configured. The SMBus address is set up on negation of PERSTN by sampling the corresponding address pins. When the pins are sampled, the resulting address is assigned as shown in Table 1. 2 of 29 June 18, 2014