Datasheet

945
SAM9X35 [DATASHEET]
11055E–ATARM–10-Mar-2014
42.7.11 Write Protected Registers
To prevent any single software error that may corrupt ADC behavior, certain address spaces can be write-protected by
setting the WPEN bit in the “ADC Write Protect Mode Register” (ADC_WPMR).
If a write access to the protected registers is detected, then the WPVS flag in the ADC Write Protect Status Register
(ADC_WPSR) is set and the field WPVSRC indicates in which register the write access has been attempted.
The WPVS flag is automatically reset by reading the ADC Write Protect Status Register (ADC_WPSR).
The protected registers are:
 “ADC Mode Register” on page 948
 “ADC Channel Sequence 1 Register” on page 950
 “ADC Channel Sequence 2 Register” on page 951
 “ADC Channel Enable Register” on page 952
 “ADC Channel Disable Register” on page 953
 “ADC Extended Mode Register” on page 962
 “ADC Compare Window Register” on page 963
 “ADC Analog Control Register” on page 965
 “ADC Touchscreen Mode Register” on page 966
 “ADC Trigger Register” on page 971