12.1.1 Description

The chip always boots from the ROM memory at start-up or after a reset.

The ROM code is a boot program contained in the embedded ROM. It is also called “Bootloader”.

By default, the chip starts in Standard Boot mode. The user can choose to enable the Secure Boot mode. To know how to set up and configure the Secure Boot mode, see Secure Boot Strategy.

Note: JTAG access is disabled during the main part of the execution of the ROM code. It is re-enabled when the Standard SAM-BA^® Monitor is executed or when jumping into a valid bootstrap.