Texas Instruments 4Q 2006 manual PCI Bridges, Two 32-bit, 33- or 66-MHz buses, Capabilities

PCI Bridges	33
	➔

Design Considerations

Peripheral Component Interconnect (PCI) is an interconnection system between a micro- processor and attached devices in which expansion slots are spaced closely for high- speed operation. A PCI-to-PCI bridge is a high-performance connection path between two PCI buses that allows bridge transactions to occur concurrently on both buses. Burst- mode transfers maximize data throughput while the two bus traffic paths through the bridge act independently. In future systems, many PCI bus structures will be replaced by

PCI Bridges

PCI2040

the new serial PCI Express architecture. TI is actively developing a portfolio of PCI Express products to address this new market.

Key Features

•Two 32-bit, 33- or 66-MHz buses

•Configurable for PCI power-management interface specification

•CompactPCI hot-swap functionality

•3.3-V core logic with 3.3- to 5-V PCI signaling compatibility

•Intel® bridge compatibility

•Transparent bridging

CPU	Host Bus
	Memory

Technical Information

Capabilities

•TI’s PCI2050B is a 32-bit, 66-MHz bridge with internal two-tier arbitration for up to 9 secondary bus masters and support for an external secondary bus. There are independent read/write buffers for each direction and 10 secondary PCI clock outputs.

Functionality

•The PCI2250 is a 33-MHz bridge similar to the PCI2050B but supports 4 secondary bus masters and 5 secondary PCI clock outputs.

PCI2050B

Host	PCI	PCI
Bridge	Device	Device

PCI2250

PCI2060

PCI bridge family of products.

PCI Bus 0

PCI2050B

PCI Bus 2

PCI Bus 1

PCI Option Card

PCI Option Card

PCI2050B	PCI	PCI	(Option)
	Device	Device

PCI Option Slot

Typical PCI-to-PCI bridge system application.

Selection Guide
	Intel-Compatible	Speed	Expansion	MicroStar BGA™	Voltage
Device	Part No.	(MHz)	Interface (bits) Hot-Swap	Packaging	(V)	Package(s)	Description

Price*

PCI Bridges

PCI2040	—	33	—	—	Yes	3.3, 5	144 BGA,	PCI-to-DSP bridge controller, compliant with	10.55
							144 LQFP	Compact PCI Hot-Swap Specification	1.00
PCI2050B	21150bc	66	32	Yes	Yes	3.3, 5	208 LQFP,	32-bit, 66-MHz, 9-master PCI-to-PCI bridge	9.50
							208 QFP, 257 BGA
PCI2250	21152ab	33	32	Friendly	No	3.3, 5	176 LQFP,	32-bit, 33-MHz PCI-to-PCI bridge, Compact	6.10
							160 QFP	PCI hot-swap friendly, 4-master
PCI2060	—	66	32	Yes	Yes	3.3, 5	257 BGA	32-bit, 66-MHz, 9-master, asynchronous	9.50
								PCI-to-PCI bridge

1Suggested resale price in U.S. dollars in quantities of 1,000.

Resources For a complete list of resources (evaluation modules, data sheets and application notes), visit interface.ti.com
Literature Number	Description
Application Notes
SCPA029A	Adding Debounce Logic to /HSSwitch Terminal
SLLA067	Comparing Bus Solutions
SCPA027	Connecting ENUM Terminal to an External Open-Drain Buffer
SCPA030	Interfacing the PCI2040 to the TMS320VC5420 DSP
SPRA679	Texas Instruments TMS320VC5409/5421 DSP to PCI Bus

Texas Instruments 4Q 2006 Interface Selection Guide