Advantech PCA-6275 manual Programming the Watchdog Timer

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APPENDIX

Programming the Watchdog Timer

A

The PCA-6275 is equipped with a watchdog timer that resets the CPU or generates an interrupt if processing comes to a standstill for any reason. This feature ensures system reliability in industrial standalone or unmanned environments.

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Contents PCA-6275 Copyright notice Acknowledgements Advantech customer services Message to the CustomerTechnical support Product warranty Initial Inspection Contents Award Bios Setup Appendix a Programming the Watchdog Timer CPU Fan Power Connectors CN8, CN9 Page Hardware Configuration Introduction Features System SpecificationsMemory Input/OutputMechanical and environmental specifications Industrial featuresBoard Layout Main Features Label Function Jumpers and ConnectorsCN1 Board layout jumper and connecter locations Board Layout Jumper and Connector LocationsSafety Precautions Jumper Settings How to set jumpersCPU core frequency J1 3-4 233 MHz Closed Cmos clear J4 Watchdog timer output J2Sample calculation Dimm memory capacity System MemorySupplementary information about DIMMs Dimm installation 0 Memory Installation Procedures1 Cache Memory Mounting CPU and cooling modules Step 2 Mounting the CPU and Cooling ModulesStep Step On-board support bracket 3 On-board Support BracketPage Connecting Peripherals IR Connector CN3 Primary CN1 and Secondary CN2 IDE ConnectorsParallel Port Connector CN5 USB Connector CN4Controlling the soft power switch ATX Power Control Connectors CN6 and J3CPU Fan Connectors CPU1 CN9 CPU2 CN8 Floppy Drive Connector CN7Front Panel Connectors CN10, CN11, CN12, CN13 and J3 Serial Ports CN15 COM1 CN16 COM2 External Suspend Switch Lead SMI CN1412 PS/2 Keyboard & Mouse Connector CN18 External Keyboard Connector CN17Award Bios Setup Entering Setup Cmos setup screen Standard Cmos SetupVirus Warning Bios Features SetupQuick Power On Self Test Boot SequenceBoot Up Floppy Seek Typematic Delay msec Typematic Rate SettingGate A20 Option Typematic Rate Chars/Sec11 PCI/VGA Palette Snoop Video Bios ShadowOS Select for Dram 64 MB 14 C8000-CBFFF Shadow / DC000-DFFFF ShadowChipset features setup screen Chipset Features SetupPower Management Setup Power ManagementHDD Power Management PCI Configuration Setup Soft-Off by PWR-BTTNIRQ Activity IRQ-xx assigned to PCI/ISA PnP DMA-x assigned to PCI/ISA PnPUsed MEM base addr N/A Load Bios Defaults Load Setup DefaultsIntegrated Peripherals IDE HDD Auto Detection Password SettingExit Without Saving Save & Exit SetupOn-board Security Setup Installation of OBS Devices Driver Installation Necessary prerequisitesBefore you begin Hardware Doctor setup initial screen Windows 95 drivers setup procedureSetup under Win95 Restarting Windows Follow the screen instructions to install the software Complete the setup Exploring Hardware Doctor Winbond Hardware Doctor On-board Security Setup Monitoring Config 10 Warning display Page Programming the Watchdog Timer Data Time Interval Programming the Watchdog TimerGosub 2000 REM Your application task #2 Page Pin Assignments Keyboard and Mouse Connnector CN18 COM1/COM2 RS-232 Serial Port CN15, CN16IDE Hard Drive Connector CN1, CN2 ATX Feature Connector CN6CPU Fan Power Connectors CN8, CN9 Table B-8 Floppy drive connector CN7 \STROBE Power LED and Keylock Connector CN11 HDD LED Connector CN12External Speaker CN10 Addr. range Hex Device System I/O PortsInterrupt Assignments DMA Channel Assignments17 1st MB Memory Map VGA Bios