Abstract: A free running oscillator in a circuit of an electronic device is calibrated by determining that the circuit of the electronic device is in an awake state; measuring an indication of frequency of the free running oscillator in response to the circuit being in the awake state; and calibrating a frequency of the free running oscillator based on the indication of frequency and the circuit being in the awake state.

Abstract: A processor system and method is described. The processor system includes a central processing unit (CPU) comprising a register for storing a stack pointer value, a non-volatile memory coupled to the CPU and having a first non-volatile memory region configured to store instructions executable by the CPU and a second non-volatile memory region configured to store a RAM-image comprising program context data. The processor system includes a random-access memory (RAM) coupled to the CPU and having a first RAM region and a second RAM region. The processor system is configured to have a first operating mode where the RAM data values are not retained and a second operating mode where the RAM is powered on.

Abstract: A processor system and method is described. The processor system includes a central processing unit (CPU) comprising a register for storing a stack pointer value, a non-volatile memory coupled to the CPU and having a first non-volatile memory region configured to store instructions executable by the CPU and a second non-volatile memory region configured to store a RAM-image comprising program context data. The processor system includes a random-access memory (RAM) coupled to the CPU and having a first RAM region and a second RAM region. The processor system is configured to have a first operating mode where the RAM data values are not retained and a second operating mode where the RAM is powered on.