®
Device Overview
The 89HPES16T7 is a member of the IDT PRECISE™ family of PCI
Express switching solutions. The PES16T7 is a 16-lane, 7-port periph-
eral chip that performs PCI Express packet switching with a feature set
optimized for high performance applications such as servers, storage
and communications/networking. It provides connectivity and switching
functions between a PCI Express upstream port and up to six down-
stream ports and supports switching between downstream ports.
Features
High Performance PCI Express Switch
– Sixteen 2.5 Gbps PCI Express lanes
– Seven switch ports
– Upstream port configurable up to x8
– Two downstream ports configurable up to x4, four downstream
ports are x1
– Low-latency cut-through switch architecture
– Support for Max Payload Sizes up to 2048 bytes
– One virtual channel
– Eight traffic classes
– PCI Express Base Specification Revision 1.1 compliant
Flexible Architecture with Numerous Configuration Options
– Automatic per port link width negotiation to x8, x4, x2 or x1
– Automatic lane reversal on all ports
– Automatic polarity inversion on all lanes
– Ability to load device configuration from serial EEPROM
Block Diagram
Frame Buffer
Transaction Layer
Data Link Layer
Multiplexer / Demultiplexer
Multiplexer / Demultiplexer
Phy
Phy
Phy
Phy
Phy
Logical
Logical
Logical
Logical
Logical
Layer
Layer
Layer
Layer
Layer
SerDes
SerDes
SerDes
SerDes
SerDes
(Port 0)
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc.
© 2008 Integrated Device Technology, Inc.
16-Lane 7-Port
PCI Express® Switch
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 sixteen 2.5 Gbps embedded SerDes with 8B/10B
encoder/decoder (no separate transceivers needed)
Reliability, Availability, and Serviceability (RAS) Features
– Supports ECRC and Advanced Error Reporting
– 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 PCI Express Native Hot-Plug, Hot-Swap capable I/O
– Compatible with Hot-Plug I/O expanders used on PC and
server motherboards
Power Management
– Utilizes advanced low-power design techniques to achieve low
typical power consumption
– Supports PCI Power Management Interface specification (PCI-
PM 1.1)
• Supports device power management states: D0, D3
– Unused SerDes are disabled
7-Port Switch Core / 16 PCI Express Lanes
Port
Route Table
Arbitration
Transaction Layer
Transaction Layer
Data Link Layer
Data Link Layer
Multiplexer / Demultiplexer
Phy
Phy
Phy
Phy
Phy
Logical
Logical
Logical
Logical
Logical
Layer
Layer
Layer
Layer
Layer
SerDes
SerDes
SerDes
SerDes
SerDes
(Port 1)
(Port 6)
Figure 1 Internal Block Diagram
1 of 33
89HPES16T7
Data Sheet
D3
cold
Scheduler
TL
DLL
Mux/Demux
Phy
Phy
Phy
Logical
Logical
Logical
Layer
Layer
Layer
SerDes
SerDes
SerDes
(Port 2)
March 25, 2008
and
hot
TL
DLL
Mux/Demux
Phy
Logical
Layer
SerDes
(Port 5)