8.3.3 Fetching of Initial Instructions

After reset has been released, the CPU starts fetching PC and SP values from the reset address, which is 0x00000000. This address points to the first executable address in the internal Flash. The code read from the Internal Flash is free to configure the clock system and clock sources. Refer to PM – Power Manager, GCLK – Generic Clock Controller and SYSCTRL – System Controller for details. Refer to the ARM Architecture Reference Manual for more information on CPU startup (http://www.arm.com).