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Current consuption problem, in Sleep Mode — Parallax Forums

Current consuption problem, in Sleep Mode

Bruce R.Bruce R. Posts: 1
edited 2009-04-08 11:15 in General Discussion
Hi, I measured the current through Vdd pin,·of SX-28 during Sleep mode and it was two high! About 2 mA, it should be around 10 uA. The microcontroller didn't have any load, even with watch dog disable. I was using the port-b for wake-up.

Could someone giveme any advice?

Thanks!

Comments

  • BeanBean Posts: 8,129
    edited 2009-04-08 11:15
    Bruce,
    Many times this is caused by floating input pins. Any pin that is an input (the default at power up) should be connected to Vdd or Vss via a resistor. Or you can use the built-in pull-ups.

    Floating inputs can toggle back and forth very quickly causing excess current.

    Bean.

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