What are some techniques for minimizing the startup time of the firmware? I want to go from 0V applied to the mcu, to be up and running as soon as the supply voltage rises to the absolute minimum voltage needed to power the mcu (1.7v?)

[Tesla DeLorean]

Avoid spinning in loops for external clocks or PLL to start.

Put code in Reset_Handler

​Avoid a lot of static Initialization.