1.4.2 Bit and Bit Field Naming Conventions

Most of the following examples are provided for the Analog-to-Digital Converter (ADC) module.

Register bits can have an individual function or be part of a bit field that has a joint function. An individual bit can be a bit that enables a module, e.g., the ENABLE bit of the ADC module in the CTRLA register. A bit field can consist of two or more bits that jointly select a specific configuration of the module they belong to. A bit field offers up to 2ⁿ selections, where n is the number of bits in the bit field.

The position of the ENABLE bit is presented in Figure 1-4, and the PRESC bit field position is presented in Figure 1-5.