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WATCHDOG TIMER - AT89S52

S.LAKSHMANAN L.SETHUPATHI

Hello Sir/madam,

Please give notes about how to use reset pin (pin no.9 of at89s52) as an output ( with help of a watchdog timer ).

Notes detail may be there in asm format

I expect your reply,

Thanks

L.Sethupathi

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    page 5

    Reset input. A high on this pin for two machine cycles while the oscillator is running resets the
    device. This pin drives high for 98 oscillator periods after the Watchdog times out. The DISRTO
    bit in SFR AUXR (address 8EH) can be used to disable this feature. In the default state of bit
    DISRTO, the RESET HIGH out feature is enabled.

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    page 5

    Reset input. A high on this pin for two machine cycles while the oscillator is running resets the
    device. This pin drives high for 98 oscillator periods after the Watchdog times out. The DISRTO
    bit in SFR AUXR (address 8EH) can be used to disable this feature. In the default state of bit
    DISRTO, the RESET HIGH out feature is enabled.

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