CS Disable

The on-board push button SW2 controls the selection (CS#) of the bootable memory components (QSPI) using a non-inverting 3-state buffer.

The rule of operation is:

SW2 (DISABLE_BOOT) pressed = booting from QSPI is disabled when a reset occurs

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