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      • Chip-Specific Configuration

      The [chip.<chip_name>] section allows you to configure chip-specific settings for different microcontrollers. These settings are optional and only needed when you want to override the default behavior.

      nRF52840

      DCDC Configuration

      The nRF52840 has two DC/DC regulators that can improve power efficiency when enabled with proper hardware support.

      Configuration Example

      [chip.nrf52840]
# Enable DCDC regulator 0
dcdc_reg0 = true
# Enable DCDC regulator 1
dcdc_reg1 = true
# Set DCDC regulator 0 voltage
dcdc_reg0_voltage = "3V3"  # Options: "3V3" or "1V8"
      Hardware Requirement

      Do not enable DC/DC regulators without an external LC filter being connected, as this will inhibit device operation, including debug access, until an LC filter is connected. ::: ::: danger Bootloader Version If your hardware is using the Adafruit nRF52 Bootloader (e.g. nice!nano) ensure that your bootloader is updated to version ≥ 0.10.0 when setting a voltage other than 3V3. There is a bug in older versions that can lead to a boot loop which can only be fixed by re-flashing the bootloader via the debug interface.

      nRF52833

      DCDC Configuration

      The nRF52833 has one DC/DC regulator available for configuration.

      Configuration Example

      [chip.nrf52833]
# Enable DCDC regulator 1
dcdc_reg1 = true
      Hardware Requirement

      Do not enable DC/DC regulator without an external LC filter being connected, as this will inhibit device operation, including debug access, until an LC filter is connected.