Flowcharts; Figure 5-6 Interrupt Handling Flowchart - ARM Cortex-M3 Technical Reference Manual

5.14

Flowcharts

5.14.1 Interrupt handling
ARM DDI 0337B
This section summarizes interrupt flow with:
• Interrupt handling
• Pre-emption on page 5-34
• Return on page 5-34.
Figure 5-6 shows how instructions execute until pre-empted by a higher-priority
interrupt.
Reset
Load SP and PC from
locations 0, 4
Execute instruction
Pending interrupt
higher priority than
active interrupt?
Yes
Preempt
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No
PC at return location?
Yes
Pending interrupt
higher priority than
stacked interrupt?
Yes

Figure 5-6 Interrupt handling flowchart

Exceptions
No
No
Return from
interrupt
5-33