Docking System Consideration | Texas Instruments PCI445X instruction

System Implementation

2)Register save/restore

Register content is not preserved in the sleeping state (it depends on the system implementation). Therefore, BIOS should restore the register content. Under Windows98, most of the register content is saved and restored by the pci.vxd and cbss.vxd.

3)Troubleshooting tips for sleep/resume issues Symptoms of sleep/resume issues are:

J System hung up during resume

J PC Card does not work after resume

J PC Card is not recognized after resume

The probable reason for these problems is that the register content is not preserved correctly. Checking the register content before taking the system to the sleep mode and after resuming from the sleep mode may shed some light. If some of the register settings are not the same after resuming from the sleep mode, then the BIOS most likely did not restore those values.

1.4.3Docking System Consideration

Subsystem IDs can be assigned as long as the SUBSYSRW bit (system control register, PCI offset 80h, bit 5) is set. It is better to do this from EEPROM as no driver will be running to set the SSID up after a hot-dock/warm-dock. Therefore, the IDs should be loaded through the I2C interface using an

EEPROM.

PCI445X Device

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Image 31

Texas Instruments PCI445X manual Docking System Consideration, Register save/restore

Contents

Implementation Guide Important Notice About This Manual Read This First Csr ±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 Interrupt Serialized Interrupt Control Socket Activity LEDsMFUNC7±MFUNC0 Terminal Assignments Miscellaneous Functions Description Memory Burst R/W Operation Control CardBus Reserved Terminal SignalingPower Savings Mode Asynchronous CSC Interrupt Generation ZV Port Control and Auto Detect Function Socket Power Lock12.9 SMI 12.11VCC Protection PERR, SERR, and Lock System ImplementationClamping Rails PCI Bus Interface INTA, INTB, and Intc Prst PCI reset and Grst Global reset Damping resistor on Cclk terminal 4 2-Wire I2C Interface for EepromSocket power supply PC Card Interface Eeprom ±1. Registers and Bits Loadable Through Serial Eeprom Sample PCI445X Eeprom Data File System Implementation Zoomed Video ZV Interface 1 P2C Interface for TPS22X6 Power Switch Miscellaneous 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 List LPS ±5. Required Pullup/Pulldown Resistors Initialization Bios ConsiderationsPCI Standard Registers Initialization PCI TI Proprietary Registers Initialization System Sleeping State Consideration Docking System Consideration Register save/restore Important Information Topic Global Reset Only Bits, PME Context Bits Table A±1.Global Reset Only Cleared Bits Global Reset Only Bits/PME Context Bits Table A±2.PME Context Bits Page PME and RI Behavior PME and RI Behavior Table B±1.CardBus Ctschg and Wake-Up Signals Truth Table PCI445X Buffer Types PCI445X Buffer Types Signal Name Terminal Type ACVS2 BCAD22 GND PHYDATA6 ZVUV4 TSO Buffer Type Description Table C±2. Buffer Type Abbreviations