The following set of steps shall occur on the EVM and AM263Px to boot the device from power-on reset.
- PORz is held low by the external power supply monitor
- VDD core digital 1.2V and VDDS3V3/VDDA3V3 3.3V supplies ramp to their nominal voltages
- This requires a logical AND be applied to the power good signal generated from each supply
- SOP[3:0] pins held in their boot latch state
- After PCB supplied power nets are stable, the external supply monitor will de-assert PORz
- Device will startup 1.8V on-die LDO
- After internal supply monitors show externally and internally generated supplies are stable, the SOP[3:0] pin states are latched
- R5F cores are unhalted and SOP selected boot ROM execution begins