Vodafone SS 08 - Manual (Page 47)

TU Dresden, 4/29/2008 Slide 47
chair
Interrupts
ƒ DSPs must be able to execute tasks on
asynchronous events
ƒ Interrupts suspend the current processor task
and save its context
ƒ A interrupt service routine (ISR) is executed
ƒ After completion of the ISR, the context of the
former task is restored and the execution
continues
ƒ Interrupts are organized hierarchically
Î
vs. Polling