1 Features

• Full ×1 PCI Express™ Throughput

• Fully Compliant With PCI Express to PCI/PCI-X

Bridge Specification, Revision 1.0

• Fully Compliant With PCI Express Base

Specification, Revision 2.0

• Fully Compliant With PCI Local Bus Specification,

Revision 2.3

• PCI Express Advanced Error Reporting Capability

Including ECRC Support

• Support for D1, D2, D3hot, and D3cold

• Active-State Link Power Management Saves

Power When Packet Activity on the PCI Express

Link is Idle, Using Both L0s and L1 States

• Wake Event and Beacon Support

• Error Forwarding Including PCI Express Data

Poisoning and PCI Bus Parity Errors

• Uses 100-MHz Differential PCI Express Common

Reference Clock or 125-MHz Single-Ended,

Reference Clock

• Optional Spread Spectrum Reference Clock is

Supported

• Robust Pipeline Architecture to Minimize

Transaction Latency

• Full PCI Local Bus 66-MHz/32-Bit Throughput

• Support for Six Subordinate PCI Bus Masters with

Internal Configurable, 2-Level Prioritization

Scheme

• Internal PCI Arbiter Supporting Up to 6 External

PCI Masters

• Advanced PCI Express Message Signaled

Interrupt Generation for Serial IRQ Interrupts

• External PCI Bus Arbiter Option

• PCI Bus LOCK Support

• JTAG/BS for Production Test

• PCI-Express CLKREQ Support

• Clock Run and Power Override Support

• Six Buffered PCI Clock Outputs (25 MHz, 33 MHz,

50 MHz, or 66 MHz)

• PCI Bus Interface 3.3-V and 5.0-V (25 MHz or

33 MHz only at 5.0 V) Tolerance Options

• Integrated AUX Power Switch Drains VAUX Power

Only When Main Power Is Off

• Five 3.3-V, Multifunction, General-Purpose I/O

Terminals

• Memory-Mapped EEPROM Serial-Bus Controller

Supporting PCI Express Power Budget/Limit

Extensions for Add-In Cards

• Compact Footprint, Lead-Free 144-Ball, ZAJ

nFBGA, Lead-Free 169-Ball ZWS nFBGA, and

PowerPad™ HTQFP 128-Pin PNP Package

2 Applications

• Enterprise systems

– Data center & enterprise computing

• Personal electronics

– PC and notebooks

• Industrial applications

– Factory automation and control

– Retail automation & payment

– Industrial transport (non-car & non-light truck)

3 Description

The XIO2001 is a single-function PCI Express to PCI

translation bridge that is fully compliant to the PCI

Express to PCI/PCI-X Bridge Specification, Revision

1.0. For downstream traffic, the bridge simultaneously

supports up to eight posted and four non-posted

transactions. For upstream traffic, up to six posted

and four non-posted transactions are simultaneously

supported.

The PCI Express interface is fully compliant to the PCI

Express Base Specification, Revision 2.0.

The PCI Express interface supports a ×1 link

operating at full 250 MB/s packet throughput in each

direction simultaneously. Also, the bridge supports the

advanced error reporting including extended CRC

(ECRC) as defined in the PCI Express Base

Specification. Supplemental firmware or software is

required to fully use both of these features.