Intel ETX CD manual Preventing Problems When Updating or Restoring Bios

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10 BIOS Operation

10.5Preventing Problems When Updating or Restoring BIOS

Updating the BIOS represents a potential hazard. Power failures or fluctuations that may occur during updating the Flash ROM can damage the BIOS code, making the system unbootable.

To prevent this potential hazard, many systems come with a boot-block Flash ROM. The boot-block region contains a fail-safe recovery routine. If the boot-block code finds a corrupted BIOS (checksum fails), it boots into the crisis recovery mode and loads a BIOS image from a crisis diskette (see above). Additionally, the end user can insert an update key into the serial port (COM1 only) to force initiating the recovery routine for the boot block.

Kontron User's Guide ETX CD

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Contents ETX CD Document Revision All not approved entries are markedThis page intentionally left blank Table of Contents Connector X4 IDE 1, IDE 2, Ethernet, Miscellaneous Kontron Users Guide ETX CD10.2.1 10.110.2 10.3User Information Technical Support Asia Europe North/South AmericaIntroduction IntroductionETX-CD 2x Serial ATA Sata 1x Parallel ATA IDEETX Documentation ETX BenefitsSpecifications Functional SpecificationsPCI 32 Intel ICH7 System MemorySerial Digital Video Output Sdvo Intel 945GM Enhanced Intelligent Drive Electronics Eide Intel ICH7Trustes Platform Module TPM Bios Phoenix, 1MB Flash-BIOS in Firmware Hub Flash MemoryAC ’97 Audio Intel 945GM Block diagram Mechanical Specifications Electrical SpecificationsETX-CD Core Duo Processor T2500 Power Consumption Windows XP SP2Cmos Battery Power Consumption Mtbf Environmental SpecificationsTemperature HumiditySpecifications General Signal Description ETX connectorsConnector Locations ETX connectorsConnector X1 PCI bus, USB, Audio Pin SignalPin Signal Description Type Termination Comment Connector X1 Signal LevelsPin 1-50 Power PCI USB Audio Type Termination Comment Pin 51-100 Power PCI USB AudioPin Signal Description PCI Bus Connector X1 Signal Description3V Power Supply for External Components AudioConnector X2 ISA Bus Connector X2 Signal Levels Pin 1-50 Power ISAPin 51-100 Power ISA Flat-Panel Interfaces Connector X2 Signal DescriptionISA Bus Slot Lvds Interface Pinout JiliParallel Port Mode Pinout Floppy Support Mode Pinout Parallel Port / Floppy InterfacesDCD1# SLCT# WGATE# DSR1# Msclk CTS1# Msdat TXD1 Kbclk Connector X3 Signal Levels Pin 1-50 Power VGA LcdtvPin 51-100 Power COM LPT Floppy KB/MS/IR Serial Ports 1 Connector X3 Signal DescriptionVGA Output PS/2 KeyboardFloppy IrDAParallel Port Connector X4 Subsystems Connector X4 IDE 1, IDE 2, Ethernet, MiscellaneousConnector X4 Signal Levels Pin 1-50Power IDE Ethernet Power control MiscPin Signal Description Type Power Management Connector X4 Signal DescriptionPower Control IDE PortsSdvo Output Feature Connector J11Sdvo Connector and Flat Foil Cable Miscellaneous CircuitsPin Pin on ETX-CD Description Bios RequirementsPinout Feature Connector J11 Reserved Special Features Special FeaturesWatchdog Timer ConfigurationThermal Management Heatspreader DimensionsDesign Considerations Design ConsiderationsPage Thermal Monitor and Catastrophic Thermal Protection I/O Apic vs 8259 PIC Interrupt modeImportant Technology Information Active Cooling Processor Performance ControlSummary Passive Cooling ETX-CD onboard Fan connectorSchematics of Fan control Critical Trip PointLocation and Pinout of Fan connector J6 Pinout Kontron Users Guide ETX CDVcc = Imax continuous = 68 a Imax pulsed = Bios SettingsElectrical characteristics Acpi Suspend Modes and Resume Events Processor Clock ThrottlingPage Interrupt Request IRQ Lines 8259 PIC modeSystem Resources Used For Available Available for PCI Comment Direct Memory Access DMA ChannelsApic mode Peripheral Component Interconnect PCI Devices Memory AreaI/O Address Map Inter-IC I2C BusJILI-I2C Bus Windows LimitationsISA Bus LimitationsSetup Guide Bios OperationDetermining the Bios Version Start Phoenix Bios Setup UtilityItem Specific Help Window Selecting an ItemDisplaying Submenus General Help WindowBios Setup Menus Info ScreenDisabled Main MenuIDE Channels Submenu AutoAdvanced Advanced Chipset Control Feature bit to always return CPU ControlDefault Chipset controlIntegrated Video DvmtISA Options PCI/PNP Configuration OtherPCI/PNP ISA UMB Region Exclusion PCI/PNP ISA IRQ Resource Exclusion Cache Memory Write ProtectDevice Configuration Lan Options Super I/O Controller Options IRQ4USB ports Console Redirection Keyboard Features Submenu 30/secHardware Monitor Watchdog Settings Display Control CRT + LFPMiscellaneous Submenu Security Menu Power Menu YesCPU Thermal Control Circuit PORBoot Menu Feature Option DescpriptionFeature Description Exit MenuUpdating or Restoring Bios Cannot flash when memory managers are presentPreventing Problems When Updating or Restoring Bios Appendix a Jida Standard Appendix a Jida StandardJida Information Buses 12.1.1 ISA, Standard PS/2 ConnectorsAppendix B PC Architecture Information 12.1.2 PCI/104Serial ATA Ports12.2.1 RS-232 Serial 12.2.3 USBKontron Users Guide ETX CD Rev. Date Author Changes Appendix C Document RevisionAppendix C Document Revision