18.3 Fuse matrix programming requires a main clock (MAINCK) frequency between 10 and 15 MHz
If the main clock is not within the range of 10 to 15 MHz while programming the fuse matrix, the correct fuse programming cannot be ensured.
Work around
- If the main clock is out of the 10 to 15 MHz range, then before programming the fuse matrix switches the main clock to the internal 12 MHz RC oscillator.
- To program the fuses during ROM Code execution, SAM-BA/Secure and SAM-BA version 3.2.2 or higher must be used.
Affected Silicon Revisions
| A | B | C | |||||
| X | X | X |