The key features are listed on this slide, some of these features will be discussed in more detail in later sections of this presentation. The first two features in the left column and the first feature in the right column list the mechanisms that can be used to wake the processor from hibernation mode. The microcontroller can wake from the hibernation mode by three different mechanisms. One can use the integrated real time clock, an external wake pin, or a low battery detection signal to wake up the microcontroller. It is also possible to retain the states of GPIO in hibernation using VDD3ON mode. Furthermore, there are two mechanisms for power control; controlling the system power using a discrete external regulator, and the on-chip power control using internal switches under register control. The hibernation module is clocked from a 32 kHz clock source and features a 32-bit battery backed memory and programmable interrupts for RTC.