I'm reading the datasheet for the SAM L21 family and in section 9.3.4 Fetching of Initial Instructions it mentions:
After Reset has been released, the CPU starts fetching PC and SP values from the Reset address,
0x00000000. This points to the first executable address in the internal Flash memory. The code read from
the internal Flash can be used to configure the clock system and clock sources. Refer to the ARM
Architecture Reference Manual for more information on CPU startup (http://www.arm.com)
I found a PDF copy of the manual and searched the entire thing for "startup" with no hits. While I don't have a specific question, I want to read more about the topic. Am I looking at the right doc? Is that a "dead reference" from Atmel?