Atmel SAM4SD32B Preliminary Data Sheet page 261

13.5.2 Reset Controller Status Register
Name: RSTC_SR
Address: 0x400E1404
Access: Read-only
31 30
– –
23 22
– –
15 14
– –
7 6
– –
• URSTS: User Reset Status
0 = No high-to-low edge on NRST happened since the last read of RSTC_SR.
1 = At least one high-to-low transition of NRST has been detected since the last read of RSTC_SR.
• RSTTYP: Reset Type
Reports the cause of the last processor reset. Reading this RSTC_SR does not reset this field.
RSTTYP
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
• NRSTL: NRST Pin Level
Registers the NRST Pin Level at Master Clock (MCK).
• SRCMP: Software Reset Command in Progress
0 = No software command is being performed by the reset controller. The reset controller is ready for a software command.
1 = A software reset command is being performed by the reset controller. The reset controller is busy.
11100B–ATARM–31-Jul-12
29
–
21
–
13
–
5
–
Reset Type
General Reset
Backup Reset
Watchdog Reset
Software Reset
User Reset
SAM4S Series [Preliminary]
28 27
– –
20 19
– –
12 11
– –
4 3
– –
Comments
First power-up Reset
Return from Backup Mode
Watchdog fault occurred
Processor reset required by the software
NRST pin detected low
26 25
– –
18 17
– SRCMP
10 9
RSTTYP
2 1
– –
24
–
16
NRSTL
8
0
URSTS
261