Datasheet

132
42023E–SAM–07/2013
ATSAM4L8/L4/L2
10.7.15 Reset Cause
Name: RCAUSE
Access Type: Read-only
Offset: 0x180
Reset Value: Latest Reset Source
• BOD33: Brown-out 3.3V Reset
This bit is set when the last reset was due to the supply voltage being lower than the BOD 3.3V (BOD33) threshold level.
• POR33: Power-on Reset
This bit is set when the last reset was due to the I/O voltage being lower than the POR33 threshold.
• OCDRST: OCD Reset
This bit is set when the last reset was due to the SYSRESETREQ bit in the AIRCR register of the CPU having been written to
one.
• BKUP: Backup reset
This bit is set when the last reset was due to a wake up from the Backup mode.
• WDT: Watchdog Reset
This bit is set when the last reset was due to a watchdog time-out.
• EXT: External Reset Pin
This bit is set when the last reset was due to the RESET_N pin being pulled low.
• BOD: Brown-out Reset
This bit is set when the last reset was due to the core supply voltage being lower than the brown-out threshold level.
• POR: Power-on Reset
This bit is set when the last reset was due to the core supply voltage being lower than the power-on threshold level,
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - BOD33 - - POR33 - OCDRST
76543210
- BKUP - - WDT EXT BOD POR