40.6.2.1 Initialization

The following registers are enable-protected, meaning that they can only be written when the ADC is disabled (CTRLA.ENABLE = 0):

• The Control B (CTRLB) register
• The Reference Control (REFCTRL) register
• The Event Control (EVCTRL) register
• The Calibration (CALIB) register

Enable-protection is denoted by the "Enable-Protected" property in the register description.