SAM7S256_14 Datasheet, PDF (57/775 Pages) ATMEL Corporation – ARM-based Flash MCU

13. Reset Controller (RSTC)
13.1
Overview
The Reset Controller (RSTC), based on power-on reset cells, handles all the resets of the system without any
external components. It reports which reset occurred last.
The Reset Controller also drives independently or simultaneously the external reset and the peripheral and proces-
sor resets.
A brownout detection is also available to prevent the processor from falling into an unpredictable state.
13.2 Block Diagram
Figure 13-1. Reset Controller Block Diagram
Reset Controller
bod_rst_en
brown_out
Main Supply
POR
Brownout
Manager
Startup
Counter
bod_reset
Reset
State
Manager
rstc_irq
NRST
WDRPROC
wd_fault
user_reset
NRST
Manager
nrst_out
exter_nreset
proc_nreset
periph_nreset
SLCK
SAM7S Series [DATASHEET] 57
6175M–ATARM–26-Oct-12