Microchip Technology megaAVR 0 Series Manual page 103

11.5.1 Reset Flag Register
Name: RSTFR
Offset: 0x00
Reset: 0xXX
Property: -
All flags are cleared by writing a '1' to them. They are also cleared by a Power-On Reset, with the
exception of the Power-On Reset Flag (PORF).
Bit 7
Access
Reset
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' to it.
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.
©
2018 Microchip Technology Inc.
6 5
UPDIRF SWRF
R/W
x
4 3
WDRF
R/W R/W
x x
Datasheet Preliminary
®
megaAVR 0-Series
Reset Controller (RSTCTRL)
2 1
EXTRF BORF
R/W R/W
x x
DS40002015A-page 103
0
PORF
R/W
x