89HPES3T3

High Performance PCI Express Switch
Three 2.5Gbps PCI Express lanes
Three switch ports
x1 Upstream port
Two 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 three 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 Reporting
Supports PCI Express Native Hot-Plug, Hot-Swap capable I/O
Compatible with Hot-Plug I/O expanders used on PC motherboards
Power Management
Utilizes advanced low-power design techniques to achieve low typical power consumption
Supports PCI Power Management Interface specification (PCIPM 1.2)
Unused SerDes are disabled.
Supports Advanced Configuration and Power Interface Specification, Revision 2.0 (ACPI) supporting active link state
Testability and Debug Features
Built in Pseudo-Random Bit Stream (PRBS) generator
Numerous SerDes test modes
Ability to bypass link training and force any link into any mode
Provides statistics and performance counters

The 89HPES3T3 is a member of IDT's PRECISE™ family of PCI Express switching solutions. The PES3T3 is a 3-lane, 3-port peripheral chip that performs PCI Express Base switching. PES3T3 provides connectivity and switching functions between a PCI Express upstream port and up to four downstream ports and supports switching between downstream ports.