12.5.1 Reset Flag Register
Name: | RSTFR |
Offset: | 0x00 |
Reset: | 0xXX |
Property: | - |
Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
UPDIRF | SWRF | WDRF | EXTRF | BORF | PORF | ||||
Access | R | R | R/W | R/W | R/W | R/W | R/W | R/W | |
Reset | 0 | 0 | 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 Brownout Reset Flag
This bit is set if a Brownout Reset occurs.
Bit 0 – PORF Power-On Reset Flag
This bit is set if a Power-on Reset occurs.
This flag is only cleared by writing a '1' it.
After a POR, only the POR flag is set and all other flags are cleared. No other flag can be set before a full system boot is run after the POR.