Microchip nanoWatt XLP MCUs offer seven operating modes that can be configured in software. The core and the peripherals are ON and run at the same clock speed in the run mode. In the doze mode, the CPU clock runs slower than the peripherals. The SRAM and the peripherals are ON while the CPU is OFF in the idle mode. The idle mode currents are typically 25% of the RUN currents. The CPU, flash and most of the peripherals are OFF while the SRAM is ON in the sleep and the low voltage sleep modes. The sleep mode offers faster wake up compared to the low voltage sleep mode. In the deep sleep mode, the core and most of the peripherals are not powered. The deep sleep option is ideal for applications that sleep a lot. This also includes BOR and WDT safety features. The V_BAT battery back up has the ability to back up the RTCC from a separate supply pin. When supplied with power through the V_BAT pin, the RTCC on the device can maintain the time with 400nA.