±5. Required Pullup/Pulldown Resistors | Texas Instruments PCI445X

System Implementation

Table 1±5. Required Pullup/Pulldown Resistors

Signal		Resistor	Recommended	Condition
			Value (Ω)

LPS		Pulldown (Default)	1.0 k	Required

Note:	All pullup/pulldown resistor value recommendations are provided as guidelines only. The best value for an individual

design varies depending upon board characteristics, standard design rules and practices, etc.

1-18

Image 28

Texas Instruments PCI445X manual ±5. Required Pullup/Pulldown Resistors, Lps

Contents

Implementation Guide Important Notice Read This First About This Manual Csr ±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 Socket Power Switches Optional PCI SignalsPCI and ISA Style Interrupt Distributed DMA Ddma Socket Activity LEDs MFUNC7±MFUNC0 Terminal AssignmentsMiscellaneous Functions Description Serialized Interrupt Control CardBus Reserved Terminal Signaling Power Savings ModeAsynchronous CSC Interrupt Generation Memory Burst R/W Operation Control Socket Power Lock 12.9 SMI12.11VCC Protection ZV Port Control and Auto Detect Function System Implementation Clamping RailsPCI Bus Interface PERR, SERR, and Lock Prst PCI reset and Grst Global reset INTA, INTB, and Intc 4 2-Wire I2C Interface for Eeprom Socket power supplyPC Card Interface Damping resistor on Cclk terminal ±1. Registers and Bits Loadable Through Serial Eeprom Eeprom Sample PCI445X Eeprom Data File System Implementation 1 P2C Interface for TPS22X6 Power Switch Zoomed Video ZV Interface Interrupt Signaling Interface Miscellaneous Signals Requirement 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 LPS Initialization Bios ConsiderationsPCI Standard Registers Initialization System Sleeping State Consideration PCI TI Proprietary Registers Initialization Register save/restore Docking System Consideration Important Information Global Reset Only Bits, PME Context Bits Topic Global Reset Only Bits/PME Context Bits Table A±1.Global Reset Only Cleared Bits Table A±2.PME Context Bits Page PME and RI Behavior Table B±1.CardBus Ctschg and Wake-Up Signals Truth Table PME and RI Behavior PCI445X Buffer Types Signal Name Terminal Type PCI445X Buffer Types ACVS2 BCAD22 GND PHYDATA6 ZVUV4 TSO Table C±2. Buffer Type Abbreviations Buffer Type Description