89HPES4T4 Datasheet, PDF (1/23 Pages) Integrated Device Technology – 4-Lane 4-Port PCI Express Switch

4-Lane 4-Port
PCI Express® Switch
®
89HPES4T4
Data Sheet
Advance Information*
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 Reporting
– Supports PCI Express Native Hot-Plug, Hot-Swap capable I/O
– Compatible with Hot-Plug I/O expanders used on PC mother-
boards
◆ _{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 Speci-
fication, 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
Block Diagram
Frame Buffer
4-Port Switch Core / 4 PCI Express Lanes
Route Table
Port
Arbitration
Scheduler
Transaction Layer
Data Link Layer
Mux / Demux
Phy
Logical
Layer
SerDes
Transaction Layer
Data Link Layer
Mux / Demux
Phy
Logical
Layer
SerDes
Transaction Layer
Data Link Layer
Mux / Demux
Phy
Logical
Layer
SerDes
Transaction Layer
Data Link Layer
Mux / Demux
Phy
Logical
Layer
SerDes
(Port 0)
(Port 2)
(Port 3)
(Port 4)
© 2007 Integrated Device Technology, Inc.
Figure 1 Internal Block Diagram
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc.
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*Notice: The information in this document is subject to change without notice
September 7, 2007