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Can a WDT of .........

Joseph George

Hello,

Can a watchdog timer of AT89s8252 reset the CPU in case of program
crash ??? .I couldnt find this info PLEASE HELP !! .


Kind Regards

JG

Parents
  • 0 in reply to Joseph George

    I think you have the dokumentation from atmel, if not here are the links.

    http://www.atmel.com/atmel/acrobat/doc0499.pdf
    http://www.atmel.com/atmel/acrobat/doc0401.pdf

    If you use only the internal WDT you have to retrigger the WDT, otherwise you get the reset (by software).

    If you had an external WDT (from Maxim o.e) remeber that you cant go into power down mode because your program will stop and cant retrigger the external watchdog with results in an hardware reset by the external WDT.

    if you use emulators you should know that when you stop your programm it is possible that the internal WDT is not stopped so you get a reset.

    In fact, there are many sources for your problem and we dont know your hardware ans software implementation.

    merry xmas, chris *<|:-)

Reply
  • 0 in reply to Joseph George

    I think you have the dokumentation from atmel, if not here are the links.

    http://www.atmel.com/atmel/acrobat/doc0499.pdf
    http://www.atmel.com/atmel/acrobat/doc0401.pdf

    If you use only the internal WDT you have to retrigger the WDT, otherwise you get the reset (by software).

    If you had an external WDT (from Maxim o.e) remeber that you cant go into power down mode because your program will stop and cant retrigger the external watchdog with results in an hardware reset by the external WDT.

    if you use emulators you should know that when you stop your programm it is possible that the internal WDT is not stopped so you get a reset.

    In fact, there are many sources for your problem and we dont know your hardware ans software implementation.

    merry xmas, chris *<|:-)

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