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4.4.5. SysTick usage hints and tips

The interrupt controller clock updates the SysTick counter. If this clock signal is stopped for low power mode, the SysTick counter stops.

Ensure software uses word accesses to access the SysTick registers.

The correct initialization sequence for the SysTick counter is:

  1. Program reload value.

  2. Clear current value.

  3. Program Control and Status register.

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