SAM9N12 Datasheet, PDF (1049/1137 Pages) ATMEL Corporation – The ARM926EJ-S based SAM9CN12 features the frequently requested combination of user...

SAM9N12/SAM9CN11/SAM9CN12
• CKEY: Countermeasure Key
This field should be written with the value 0xE to allow CMTYPx field changes.
If the field is written with a different value, changes made through the CMTYPx field will not be taken into account.
Note: CKEY field is write-only.
• CMTYP1: CounterMeasure Type 1
0 (NOPROT_EXTXKEY): Counter-Measure type 1 is disabled
1 (PROT_EXTKEY): Counter-Measure type 1 is enabled
• CMTYP2: CounterMeasure Type 2
0 (NO_PAUSE): Counter-Measure type 2 is disabled
1 (PAUSE): Counter-Measure type 2 is enabled
• CMTYP3: CounterMeasure Type 3
0 (NO_DUMMY): Counter-Measure type 3 is disabled
1 (DUMMY): Counter-Measure type 3 is enabled
• CMTYP4: CounterMeasure Type 4
0 (NO_RESTART): Counter-Measure type 4 is disabled
1 (RESTART): Counter-Measure type 4 is enabled
• CMTYP5: CounterMeasure Type 5
0 (NO_ADDACCESS): Counter-Measure type 5 is disabled
1 (ADDACCESS): Counter-Measure type 5 is enabled
• CMTYP6: CounterMeasure Type 6
0 (NO_IDLECURRENT): Counter-Measure type 6 is disabled
1 (IDLECURRENT): Counter-Measure type 6 is enabled
Note: All the countermeasures are enabled by default.
Note: CMTYPx fields are write-only and can only be modified if CKEY is correctly set.
11063G–ATARM–09-Oct-12
1049