SAM4L Datasheet, PDF (126/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

ATSAM4L4/L2
10.7.15 Reset Cause
Name:
RCAUSE
Access Type:
Read-only
Offset:
0x180
Reset Value:
Latest Reset Source
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
7
6
5
-
BKUP
-
4
3
2
1
0
-
WDT
EXT
BOD
POR
• 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,
42023C–SAM–02/2013
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