Texas Instruments PCI445X manual Requirement of Pullup/Pulldown Resistors

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System Implementation

Figure 1±6. Distributed DMA Signal Connection

PCREQ

PCI445X

PCGNT

South

Bridge

(ex., PIIX4)

1.3.5Requirement of Pullup/Pulldown Resistors

Note:

The PCI445X device has integrated pullup resistors and does not require external pullups.

Table 1±2. PC Card Interface Pullup Resistor List² ³

Terminal Name

Terminal Name

Terminal Name

(16-bit Memory PC Card)

(16-bit I/O PC Card)

(CardBus PC Card)

Pull Up to Voltage

VCC

CD1

CD1

CCD1

VCC

CD2

CD2

CCD2

VCC

VS1

VS1

CVS1

VCC

VS2

VS2

CVS2

A19

A19

VCCA or VCCB

CBLOCK

A20

A20

VCCA or VCCB

CSTOP

A21

A21

VCCA or VCCB

CDEVSEL

A22

A22

VCCA or VCCB

CTRDY

RESET

RESET

VCCA or VCCB

CRST

VCCA or VCCB

WAIT

WAIT

CSERR

RFU

VCCA or VCCB

INPACK

CREQ

BVD2

CAUDIO

VCCA or VCCB

SPKR

BVD1

CSTSCHG

VCCA or VCCB

STSCHG

A14

A14

VCCA or VCCB

CPERR

READY

VCCA or VCCB

IREQ

CINT

A15

A15

VCCA or VCCB

CIRDY

WP

VCCA or VCCB

IOIS16

CCLKRUN

²The PCI445X device has integrated pullup resistors and does not require external pullups. ³ CFRAME needs a pullup resistor, but it should be implemented on each PC Card.

1-16

Image 26

Contents Implementation Guide Important Notice Read This First About This ManualCsr ±a /user/ti/simuboard/utilities Related Documentation From Texas Instruments Page Contents Viii Figures Tables PCI445X Device Topic±1. Typical System Architecture System Features Selection PCI and ISA Style Interrupt Socket Power SwitchesOptional PCI Signals Distributed DMA DdmaMiscellaneous Functions Description Socket Activity LEDsMFUNC7±MFUNC0 Terminal Assignments Serialized Interrupt ControlAsynchronous CSC Interrupt Generation CardBus Reserved Terminal SignalingPower Savings Mode Memory Burst R/W Operation Control12.11VCC Protection Socket Power Lock12.9 SMI ZV Port Control and Auto Detect FunctionPCI Bus Interface System ImplementationClamping Rails PERR, SERR, and LockPrst PCI reset and Grst Global reset INTA, INTB, and IntcPC Card Interface 4 2-Wire I2C Interface for EepromSocket power supply Damping resistor on Cclk terminal±1. Registers and Bits Loadable Through Serial Eeprom EepromSample PCI445X Eeprom Data File System Implementation 1 P2C Interface for TPS22X6 Power Switch Zoomed Video ZV InterfaceInterrupt Signaling Interface Miscellaneous SignalsRequirement of Pullup/Pulldown Resistors ±2. PC Card Interface Pullup Resistor List² ³±3. PCI Bus Interface Pullup Resistor List ±4. Miscellaneous Terminals Pullup Resistor List±5. Required Pullup/Pulldown Resistors LPSPCI Standard Registers Initialization Bios ConsiderationsInitialization System Sleeping State Consideration PCI TI Proprietary Registers InitializationRegister save/restore Docking System ConsiderationImportant Information Global Reset Only Bits, PME Context Bits TopicGlobal Reset Only Bits/PME Context Bits Table A±1.Global Reset Only Cleared BitsTable A±2.PME Context Bits Page PME and RI Behavior Table B±1.CardBus Ctschg and Wake-Up Signals Truth Table PME and RI BehaviorPCI445X Buffer Types Signal Name Terminal Type PCI445X Buffer TypesACVS2 BCAD22 GND PHYDATA6 ZVUV4 TSO Table C±2. Buffer Type Abbreviations Buffer Type Description