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Disabling Bluetooth/WIFI

joevl

We need to physically disable the Bluetooth/WIFI capability on the Ultra96 due to security requirements.
Options we are considering:

  1. Cutting pin 19 (chip enable) on the ATWILC3000 module and tying it to ground
  2. Completely removing the ATWILC3000 module

Has anyone tried this before?

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  • 0

      No I have not tried this. But following this:

    When VDDIO is OFF and CHIP_EN is low, the chip is powered off with no leakage.

    Just jumper the pin 19 to ground and cut power to VDDIO. This will also disable the SD card as well. Is that OK?

  • 0 in reply to clem57

    More details:

    When power is not supplied to the device (DC/DC converter output and VDDIO are OFF, at ground

    potential), voltage cannot be applied to the ATWILC3000-MR110CA module pins because each pin

    contains an ESD diode from the pin to supply. This diode turns on when voltage higher than one diode-

    drop is supplied to the pin.

    If voltage must be applied to the signal pads when the chip is in a low-power state, the VDDIO supply

    must be ON, so the Power_Down state must be used. Similarly, to prevent the pin-to-ground diode from

    turning ON, do not apply voltage that is more than one diode-drop below the ground to any pin.

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  • 0 in reply to clem57

    More details:

    When power is not supplied to the device (DC/DC converter output and VDDIO are OFF, at ground

    potential), voltage cannot be applied to the ATWILC3000-MR110CA module pins because each pin

    contains an ESD diode from the pin to supply. This diode turns on when voltage higher than one diode-

    drop is supplied to the pin.

    If voltage must be applied to the signal pads when the chip is in a low-power state, the VDDIO supply

    must be ON, so the Power_Down state must be used. Similarly, to prevent the pin-to-ground diode from

    turning ON, do not apply voltage that is more than one diode-drop below the ground to any pin.

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