Device Overview
of PCI Express® switching solutions. The PES48H12AG2 is a 48-lane,
12-port system interconnect switch optimized for PCI Express Gen2
packet switching in high-performance applications, supporting multiple
simultaneous peer-to-peer traffic flows. Target applications include
servers, storage, communications, embedded systems, and multi-host
or intelligent I/O based systems with inter-domain communication.
PES48H12AG2 provides the most efficient system interconnect
switching solution for applications requiring high throughput, low latency,
and simple board layout with a minimum number of board layers. Each
lane is capable of 5 GT/s of bandwidth in both directions and is fully
compliant with PCI Express Base specification 2.0.
Features
© 2008 Integrated Device Technology, Inc.
The 89HPES48H12AG2 is a member of the IDT PRECISE™ family
Utilizing
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– 48-lane 12-port PCIe switch
– Integrated SerDes supports 5.0 GT/s Gen2 and 2.5 GT/s
– Delivers up to 48 GBps (384 Gbps) of switching capacity
– Supports 128 Bytes to 2 KB maximum payload size
– Low latency cut-through architecture
– Supports one virtual channel and eight traffic classes
– PCI Express Base Specification 2.0 compliant
– Implements the following optional PCI Express features
– x4 and x8 ports
– Automatic per port link width negotiation
High Performance Non-Blocking Switch Architecture
Standards and Compatibility
Port Configurability
• Six x8 ports switch ports each of which can bifurcate to two
• Advanced Error Reporting (AER) on all ports
• End-to-End CRC (ECRC)
• Access Control Services (ACS)
• Power Budgeting Enhanced Capability
• Device Serial Number Enhanced Capability
• Sub-System ID and Sub-System Vendor ID Capability
• Internal Error Reporting ECN
• Multicast ECN
• VGA and ISA enable
• L0s and L1 ASPM
• ARI ECN
• Ability to merge adjacent x4 ports to create a x8 port
Gen1 operation
(x8 --> x4 --> x2 --> x1)
x4 ports (total of twelve x4 ports)
standard
PCI
Express
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc.
®
Gen2
48-Lane 12-Port PCIe® Gen2
System Interconnect Switch
interconnect,
the
1 of 3
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– Crosslink support
– Automatic lane reversal
– Autonomous and software managed link width and speed
– Per lane SerDes configuration
– IDT proprietary feature that creates logically independent
– Supports up to 12 fully independent switch partitions
– Configurable downstream port device numbering
– Supports dynamic reconfiguration of switch partitions
– Supports Root (BIOS, OS, or driver), Serial EEPROM, or
– Common switch configurations are supported with pin strap-
– Supports in-system Serial EEPROM initialization/program-
– Port arbitration
– Request metering
– High performance switch core architecture
– Compliant to the PCI-SIG multicast ECN
– Supports arbitrary multicasting of Posted transactions
– Supports 64 multicast groups
– Multicast overlay mechanism support
– ECRC regeneration support
– Supports 100 MHz and 125 MHz reference clock frequencies
– Flexible port clocking modes
Switch Partitioning
Initialization / Configuration
Quality of Service (QoS)
Multicast
Clocking
• De-emphasis
• Receive equalization
• Drive strength
• Dynamic port reconfiguration — downstream, upstream
• Dynamic migration of ports between partitions
• Movable upstream port within and between switch partitions
• Round robin
• Weighted Round Robin (WRR)
• IDT proprietary feature that balances bandwidth among
• Combined Input Output Queued (CIOQ) switch architecture
• Common clock
• Non-common clock
control
switches in the device
SMBus switch initialization
ping (no external components)
ming
switch ports for maximum system throughput
with large buffers
89HPES48H12AG2
September 25, 2008
Product Brief