SAM L10 Debug Access Level (DAL)

Debug Access Level Overview

The SAM L10 has only two Debug Access Levels (DAL):

  • DAL2: Highest DAL with no restrictions in term of memory and peripheral accesses.
  • DAL0: No access is authorized except with a debugger using the Boot ROM Interactive mode.

Decreasing the DAL is done using the NVMCTRL peripheral command from the debugger or the CPU. For security reasons, increasing the DAL is only possible during Boot ROM execution and will be always preceded by a ChipErase depending on the DAL.

Related Peripherals

The DAL is modified by the NVM Controller (NVMCTRL).

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