What is the IOVDD connection options on EFM32 devices?


EFM32 Series 0 devices:

It requires the AVDD, VDD_DREG, and IOVDD pins to be connected together.


EFM32 Series 1 devices:

The three main options for IOVDD are:

  • Connect IOVDD to AVDD
  • Connect IOVDD to DC-DC output (Typically = 1.8 V)
  • Connect IOVDD to an external/independent supply

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