1 of 28 June 18, 2014
2014 Integrated Device Technology, Inc.
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc.
Device Overview
The 89HPES5T5 is a member of IDT’s PRECISE™ family of PCI
Express switching solutions. The PES5T5 is an 5-lane, 5-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
uHigh Performance PCI Express Switch
– Five 2.5Gbps PCI Express lanes
– Five switch ports
– Upstream port is x1
– Downstream ports are x1
– 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
uFlexible Architecture with Numerous Configuratio n Options
– Automatic lane reversal on all ports
– Automatic polarity inversion
– Ability to load device configuration from serial EEPROM
uLegacy Support
– PCI compatible INTx emulation
– Bus locking
uHighly Integrated Solution
– Requires no external components
– Incorporates on-chip internal memory for packet buffering and
queueing
– Integrates five 2.5 Gbps embedded SerDes with 8B/10B
encoder/decoder (no separate transceivers needed)
uReliability, 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 mother-
boards
uPower 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 Speci-
fication, Revision 2.0 (ACPI) supporting active link state
uTestability and Debug Features
– Built in Pseudo-Random Bit Stream (PRBS) generator
– Numerous SerDes test modes
– Ability to read and write any internal register via the SMBus
– Ability to bypass link training and force any link into any mode
– Provides statistics and performance counters
Block Diagram
Figure 1 Internal Block Diagram
5-Port Switch Core / 5 PCI Express Lanes
Frame Buffer Route Table Port
Arbitration Scheduler
SerDes
Phy
Logical
Layer
Mux / Demux
Transaction Layer
Data Link Layer
(Port 0) (Port 2)
SerDes
Phy
Logical
Layer
Mux / Demux
Transaction Layer
Data Link Layer
SerDes
Phy
Logical
Layer
Mux / Demux
Transaction Layer
Data Link Layer
(Port 3 ) (Port 5)
SerDes
Phy
Logical
Layer
Transaction Layer
Data Link Layer
Mux / Demux
(Port 4)
SerDes
Phy
Logical
Layer
Transaction Layer
Data Link Layer
Mux / Demux
89PES5T5
Data Sheet
5-Lane 5-Port PCI Express®
Switch