PCI4451 datasheet(45/216 Pages) TI

45 / 216 page

3–1

3 Feature/Protocol Descriptions

Figure 3–1 shows a simplified system implementation example using the PCI4451. The PCI interface includes all

address/data and control signals for PCI protocol. Highlighted in this diagram is the functionality supported by the

PCI4451. The PCI4451 supports PC/PCI DMA, PCI Way DMA (distributed DMA), PME wake-up from D3cold through

D0, four interrupt modes, an integrated zoomed video port, and 12 multifunction terminals (eight MFUNC and four

GPIO terminals) that can be programmed for a wide variety of functions.

PCI4451

Activity LED’s

South Bridge

IRQSER

Embedded

Controller

DMA

PME

23 for ZV†

PC Card

Socket A

TPS2216 or

Micrel 2564A

Power

Switch

PC Card

Socket B

VGA

Controller

Zoomed Video

19 Video

CLKRUN

Interrupt Routing Options:

1) Serial ISA/Serial PCI

2) Serial ISA/Parallel PCI

Enable

23 for ZV

PCI Bus

Clock

4 Audio

PHY

1394 Ports

OHCI-PHY

Interface

Audio

Codec

† The PC Card interface is 68 terminals for CardBus and 16-bit PC Cards. In zoomed-video mode 23 terminals are used for routing the zoomed

video signals to the VGA controller and audio codec.

Figure 3–1. PCI4451 System Block Diagram

3.1

I/O Characteristics

Figure 3–2 shows a 3-state bidirectional buffer illustration for reference. Section 12.2, Recommended Operating

Conditions, provides the electrical characteristics of the inputs and outputs. The PCI4451 meets the ac specifications

of the 1995 PC Card Standard and the PCI Local Bus Specification.

PCI4451 Datasheet(PDF) 45 Page - Texas Instruments

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