Look in device datasheet peripheral's subsection "Register Access Protection" to see which is actually available for your device.
| Module | Non-write protected register |
|---|---|
| AC | INTFLAG |
| STATUSA | |
| STATUSB | |
| STATUSC | |
| ADC | INTFLAG |
| STATUS | |
| RESULT | |
| EVSYS | INTFLAG |
| CHSTATUS | |
| NVMCTRL | INTFLAG |
| STATUS | |
| PM | INTFLAG |
| PORT | N/A |
| RTC | INTFLAG |
| READREQ | |
| STATUS | |
| SYSCTRL | INTFLAG |
| SERCOM | INTFALG |
| STATUS | |
| DATA | |
| TC | INTFLAG |
| STATUS | |
| WDT | INTFLAG |
| STATUS | |
| (CLEAR) | |
1.8.5