
© G.N. Khan ARM Processors/Cores – EE8205: Embedded Computer Systems Page: 42
Interrupt Latency
Tail Chaining
ISR UnstackingStacking
12
Cycles
Latency:
17 Cycles
Input data
read from
device
Abandons any
instruction longer
than 1 cycle
ISR #1 Unstacking ISR #2
12 Cycles 24 Cycles 12 Cycles
12 Cycles
6 Cycles 12 Cycles
With Tail-Chaining
Stacking
UnstackingStacking
Stacking ISR #1 ISR #2 Unstacking
Without Tail-Chaining
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