Reset Flag Register
All flags are cleared by writing a ‘1
’ to them. They are also
cleared by a Power-on Reset (POR), except for the Power-on Reset Flag (PORF).
Bit7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
UPDIRF | SWRF | WDRF | EXTRF | BORF | PORF | ||
Access | R/W | R/W | R/W | R/W | R/W | R/W | |
Reset | x | x | x | x | x | x |
UPDI Reset Flag
This bit is set if a UPDI Reset occurs.
Software Reset Flag
This bit is set if a Software Reset occurs.
Watchdog Reset Flag
This bit is set if a Watchdog Reset occurs.
External Reset Flag
This bit is set if an External Reset occurs.
Brown-out Reset Flag
This bit is set if a Brown-out Reset occurs.
Power-on Reset Flag
This bit is set if a POR occurs.
After a POR, only the POR flag is set and all the other flags are cleared. No other flags can be set before a full system boot is run after the POR.