7.3.3 Fetching of Initial Instructions

After reset has been released, the CPU starts fetching PC and SP values from the reset address, 0x00000000, which 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 the “Arm Architecture Reference Manual” for additional information on CPU start up, which is available for download at http://www.arm.com.