Low Power Modes
In subsleep mode the on-chip peripheral modules operate based on the subclock. Subsleep
mode differs from subactive mode in that the CPU is stopped in subsleep mode.
In watch mode, a subset of the on-chip peripheral modules operate based on the subclock.
In standby mode the CPU and all the on-chip peripheral modules are stopped. In this mode the
IC's current drain is reduced to its lowest level, only a few µA. The contents of the on-chip
RAM can be maintained by applying the specified data retention voltage to the IC.