12.5.1 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).
| Name: | RSTFR |
| Offset: | 0x00 |
| Reset: | 0xXX |
| Property: | - |
| Bit | 7 | 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 |
Bit 5 – UPDIRF UPDI Reset Flag
This bit is set if a UPDI Reset occurs.
Bit 4 – SWRF Software Reset Flag
This bit is set if a Software Reset occurs.
Bit 3 – WDRF Watchdog Reset Flag
This bit is set if a Watchdog Reset occurs.
Bit 2 – EXTRF External Reset Flag
This bit is set if an External Reset occurs.
Bit 1 – BORF Brown-out Reset Flag
This bit is set if a Brown-out Reset occurs.
Bit 0 – PORF 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.