GPIOs and switching off the module

One thought on “GPIOs and switching off the module

  1. Q:

    In order to save the power consumption during the sleep mode, in my application I need to turn off Telit module . However, I would like to maintain the status of GPIO. What should I do? Should I provide the backup for Main power system of the module? 

     

    A:

    The status of the GPIO pins is lost when the module is turned off.
    GPIOs
    that are different are GPIO4, GPIO5, GPIO6 and GPIO7 that remain in the
    same direction as previously set but loose the pin .
    Also providing a
    backup for Main power system of the GM862 does not affect this
    behavior, once shut down the status of the GPIO pins is reset.
    You
    can store the status of the pins somewhere else (in the controlling
    application?) and issue on startup the appropriate AT#GPIO commands to
    restore it.
    When turned off, all internal logic is shut down, except for the Real time clock.