14.1.1.1 Standard Boot Mode or FFPI Monitor

When Standard Boot mode is selected, the ROM code jumps directly into the internal Flash memory to execute the user application. When entering FFPI Monitor, the ROM code keeps the system clock configuration that was set at power-on or reset: no PLL is enabled, CPU Core 0 and MCK0 are sourced by the MAIN clock running from the 12 MHz internal RC oscillator. The value of the GPBR[15] register is ignored.