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ARM Keil RTX Real-Time Operating System
Energy Micro has implemented an extension to the ARM Keil RTX that is referred to as a ?tickless? mode and which allows the EFM32 MCU to wake up only when needed, either at a scheduled time or on an interrupt event. This results in orders of magnitude better current consumption than competing solutions based on using the system timer, SysTick, which require a constantly running, high frequency clock. With RTX RTOS, EFM32 users can now enter a deep sleep mode, consuming less than 1uA, between normal active operations.
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