Texas Instruments PCI445X manual ±3. PCI Bus Interface Pullup Resistor List

Page 27

System Implementation

Table 1±3. PCI Bus Interface Pullup Resistor List

PCI Signal

Pull-Up Voltage

VCCP

FRAME

VCCP

TRDY

VCCP

IRDY

VCCP

DEVSEL

VCCP

STOP

VCCP

SERR

VCCP

PERR

VCCP

LOCK

INTA

INTB

VCCP

INTC

VCCP

CLKRUN

VCCP

PRST

VCCP

G_RST

System dependent

PME

The pullup/pulldown on MFUNC depends on how it is implemented. Some signals may require pullups, others pulldowns, and for a GPI or GPO only the system designer would know how that line should be pulled.

Table 1±4. Miscellaneous Terminals Pullup Resistor List

	PCI Signal							Required Situation	Pullup/Pulldown
									Voltage

	MFUNC7±MFUNC4							N/C or used as output	VCCP or GND

	MFUNC3±MFUNC0							N/C or used as output	VCCP or GND
	(GPIO3±GPIO0)


	MFUNC7(LOCK)							N/C or used as output	VCCP
	CLOCK							Internal OSC is selected	GND

	LATCH							If MFUNC7 is used for IDSEL	GND

	IRQSER								VCCP
									System dependent
	RI_OUT/PME								System dependent

									System dependent
	SUSPEND								System dependent

Note: Removing clamping voltage makes all the clamped signals low.

PCI445X Device

1-17

Image 27

Contents Implementation Guide Important Notice About This Manual Read This FirstCsr ±a /user/ti/simuboard/utilities Related Documentation From Texas Instruments Page Contents Viii Figures Tables Topic PCI445X Device±1. Typical System Architecture System Features Selection Distributed DMA Ddma Socket Power SwitchesOptional PCI Signals PCI and ISA Style InterruptSerialized Interrupt Control Socket Activity LEDsMFUNC7±MFUNC0 Terminal Assignments Miscellaneous Functions DescriptionMemory Burst R/W Operation Control CardBus Reserved Terminal SignalingPower Savings Mode Asynchronous CSC Interrupt GenerationZV Port Control and Auto Detect Function Socket Power Lock12.9 SMI 12.11VCC ProtectionPERR, SERR, and Lock System ImplementationClamping Rails PCI Bus InterfaceINTA, INTB, and Intc Prst PCI reset and Grst Global resetDamping resistor on Cclk terminal 4 2-Wire I2C Interface for EepromSocket power supply PC Card InterfaceEeprom ±1. Registers and Bits Loadable Through Serial EepromSample PCI445X Eeprom Data File System Implementation Zoomed Video ZV Interface 1 P2C Interface for TPS22X6 Power SwitchMiscellaneous Signals Interrupt Signaling Interface±2. PC Card Interface Pullup Resistor List² ³ Requirement of Pullup/Pulldown Resistors±4. Miscellaneous Terminals Pullup Resistor List ±3. PCI Bus Interface Pullup Resistor ListLPS ±5. Required Pullup/Pulldown ResistorsBios Considerations InitializationPCI Standard Registers Initialization PCI TI Proprietary Registers Initialization System Sleeping State ConsiderationDocking System Consideration Register save/restoreImportant Information Topic Global Reset Only Bits, PME Context BitsTable A±1.Global Reset Only Cleared Bits Global Reset Only Bits/PME Context BitsTable A±2.PME Context Bits Page PME and RI Behavior PME and RI Behavior Table B±1.CardBus Ctschg and Wake-Up Signals Truth TablePCI445X Buffer Types PCI445X Buffer Types Signal Name Terminal TypeACVS2 BCAD22 GND PHYDATA6 ZVUV4 TSO Buffer Type Description Table C±2. Buffer Type Abbreviations