SAM7S256_14 Datasheet, PDF (174/775 Pages) ATMEL Corporation – ARM-based Flash MCU

enable an as fast as possible return to the normal execution flow. This handler writes in AIC_EOICR and performs
a return from interrupt.
23.7.7 General Interrupt Mask
The AIC features a General Interrupt Mask bit to prevent interrupts from reaching the processor. Both the nIRQ
and the nFIQ lines are driven to their inactive state if the bit GMSK in AIC_DCR (Debug Control Register) is set.
However, this mask does not prevent waking up the processor if it has entered Idle Mode. This function facilitates
synchronizing the processor on a next event and, as soon as the event occurs, performs subsequent operations
without having to handle an interrupt. It is strongly recommended to use this mask with caution.
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
174