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clearing AL bit in TMP112

Other Parts Discussed in Thread: TMP112

Hello,

I need some help on clearing AL bit in TMP112. I can read temperature value and I also get interrupt once but then once AL bit is high it is not getting low.

If anybody know about it please let me know so that I can get things going at my end.

regards,

Ketan

  • This was not answered will close it now.
    Alert can function as a comparator output or as an interrupt output. From the datasheet:
    7.4.4 Thermostat Mode (TM)
    The thermostat mode bit indicates to the device whether to operate in comparator mode (TM = 0 ) or interrupt
    mode (TM = 1).
    7.4.4.1 Comparator Mode (TM = 0)
    In Comparator mode (TM = 0), the Alert pin is activated when the temperature equals or exceeds the value in the
    T(HIGH) register and remains active until the temperature falls below the value in the T(LOW)register. For more
    information on the comparator mode, see the High- and Low-Limit Register section.
    7.4.4.2 Interrupt Mode (TM = 1)
    In Interrupt mode (TM = 1), the Alert pin is activated when the temperature exceeds T(HIGH) or goes below T(LOW)
    registers. The Alert pin is cleared when the host controller reads the temperature register. For more information
    on the interrupt mode, see the High- and Low-Limit Register section.

    Take care,