15.3.7 Synchronization Delay

The synchronization will delay the write or read access duration by a delay D, given by the equation:

5 ⋅ P GCLK + 2 ⋅ P APB < D < 6 ⋅ P GCLK + 3 ⋅ P APB

Where P GCLK is the period of the generic clock and P APB is the period of the peripheral bus clock. A normal peripheral bus register access duration is 2 ⋅ P APB .