at91cap7e ATMEL Corporation, at91cap7e Datasheet - Page 73

• Manufacturer Part Number: at91cap7e
• Description: Customizable Microcontroller
• Manufacturer: ATMEL Corporation

Figure 14-7. Watchdog Reset
14.3.4
14.3.5
8549A–CAP–10/08
Reset State Priorities
Reset Controller Status Register
WDRPROC = 0
Only if
The Reset State Manager manages the following priorities between the different reset sources,
given in descending order:
Particular cases are listed below:
The Reset Controller status register (RSTC_SR) provides several status fields:
• Backup Reset
• Wake-up Reset
• Watchdog Reset
• Software Reset
• User Reset
• When in User Reset:
• When in Software Reset:
• When in Watchdog Reset:
periph_nreset
proc_nreset
(nrst_out)
RSTTYP
– A watchdog event is impossible because the Watchdog Timer is being reset by the
– A software reset is impossible, since the processor reset is being activated.
– A watchdog event has priority over the current state.
– The NRST has no effect.
– The processor reset is active and so a Software Reset cannot be programmed.
– A User Reset cannot be entered.
wd_fault
NRST
SLCK
proc_nreset signal.
MCK
Freq.
Any
Any
Processor Startup
= 3 cycles
XXX
EXTERNAL RESET LENGTH
8 cycles (ERSTL=2)
0x2 = Watchdog Reset
AT91CAP7E
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