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Cortex-M interrupt priority numbers

On a Cortex-M, the UART interrupt has priority 1 and the timer interrupt has priority 5. Which can preempt the other?

A.The timer can preempt the UART handler, because 5 is higherB.Neither, because Cortex-M does not support nestingC.Both can preempt each otherD.The UART can preempt the timer handler, because a lower number means higher priority

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Cortex-M interrupt priority numbers

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