Pes4T4 Device Overview; Introduction; List Of Features - Renesas IDT 89HPES4T4 User Manual

Notes
PES4T4 User Manual
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Introduction

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 connec-
tivity and switching functions between a PCI Express upstream port and up to four downstream ports and
supports switching between downstream ports.

List of 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 trans-
ceivers 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 (PCI-PM 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

PES4T4 Device Overview

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Chapter 1
February 1, 2011