Datasheet

276
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
14.5.2 Reset Controller Status Register
Name: RSTC_SR
Address: 0x400E1404
Access: Read-only
• 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.
• 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.
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
––––––SRCMPNRSTL
15 14 13 12 11 10 9 8
––––– RSTTYP
76543210
–––––––URSTS
Value Name Description
0 GENERAL_RST First power-up Reset
1 BACKUP_RST Return from Backup Mode
2 WDT_RST Watchdog fault occurred
3 SOFT_RST Processor reset required by the software
4 USER_RST NRST pin detected low