The boot process can be based on a primary boot device such as SD, eMMC, QSPI, OSPI, JTAG, or SelectMAP. At POR or system reset, the boot process starts with the primary boot:
- Reads the boot mode register to determine the primary boot device
- Loads the PLM from the specified primary boot device into the PPU RAM
- Releases the PPU to execute the PLM
- Loads remainder of PDI content (Images and partitions) from the primary boot device.