Data Type ‘BIT’¶

You can use the BIT data type only for single variables in structures. The possible values are TRUE (1) and FALSE (0).

A BIT element requires one bit of memory. Therefore, you can reference single bits of a structure by name. BIT elements that are declared in succession are bundled in bytes. In this way, you can optimize memory use as opposed to BOOL types, which reserve eight bits each. On the other hand, bit access is significantly more time-consuming. Therefore, you should use the BIT data type only when you need to define data in a predefined format.