3.2.5.1 CS Disable Boot

One jumper (J13) controls the selection (CS#) of the bootable memory components (QSPI) using a non-inverting 3-state buffer.

Figure 3-13. CS Disable Boot

The rule of operation is:

  • PB1 (RESET) pressed and J13 open = booting from QSPI on SOM
  • PB1 (RESET) pressed and J13 closed = booting from QSPI on baseboard if fitted. The QSPI on SOM is disabled.

Refer to the SAMA5D2 Series datasheet for more information on standard boot strategies and sequencing.