The 6 registers of RSTC (Reset Controller), from 0x40000800, with their reset value and every field. The ATSAML21E16B has 1205 registers in 40 peripherals, one page each.
RSTC Reset Controller
RCAUSEReset Cause
Address
0x40000800
Reset
0x00
Access
read only
7BACKUP
6SYST
5WDT
4EXT
3–
2BOD33
1BOD12
0POR
7 fields
Field
Bits
What it does
BACKUP
7
Backup Reset
SYST
6
System Reset Request
WDT
5
Watchdog Reset
EXT
4
External Reset
BOD33
2
Brown Out 33 Detector Reset
BOD12
1
Brown Out 12 Detector Reset
POR
0
Power On Reset
BKUPEXITBackup Exit Source
Address
0x40000802
Reset
0x00
Access
read only
7–
6–
5–
4–
3–
2BBPS
1RTC
0EXTWAKE
3 fields
Field
Bits
What it does
BBPS
2
Battery Backup Power Switch
RTC
1
Real Timer Counter Interrupt
EXTWAKE
0
External Wakeup
WKDBCONFWakeup Debounce Configuration
Address
0x40000804
Reset
0x00
Access
read/write
7–
6–
5–
4WKDBCNT4
3WKDBCNT3
2WKDBCNT2
1WKDBCNT1
0WKDBCNT0
1 field
Field
Bits
What it does
WKDBCNT
4:0
Wakeup Debounce Counter
0 No debouncing.Input pin is low or high level sensitive depending on its WKPOLx bit.
1 Input pin shall be active for at least two 32kHz clock period.
2 Input pin shall be active for at least three 32kHz clock period.
3 Input pin shall be active for at least 32 32kHz clock period.
4 Input pin shall be active for at least 512 32kHz clock period.
5 Input pin shall be active for at least 4096 32kHz clock period.
6 Input pin shall be active for at least 32768 32kHz clock period.
BETA