2-SYSCLKOUT cycle delay from when a write to the PCLKCR0/1/3 registers occurs to when the action is
valid. This delay must be taken into account before attempting to access the peripheral configuration
registers. Due to the peripheral-GPIO multiplexing at the pin level, all peripherals cannot be used at the
same time. While it is possible to turn on the clocks to all the peripherals at the same time, such a
configuration may not be useful. If this is done, the current drawn will be more than required. To avoid this,
only enable the clocks required by the application.