External Interrupts
Technical Summary, Rev. 3
Freescale Semiconductor
2-13
2.9 External Interrupts
Two on-board push-button switches are provided for external interrupt generation, as shown in
Figure 2-8
. S1 allows the user to generate a hardware interrupt for signal line IRQA. S2 allows
the user to generate a hardware interrupt for signal line IRQB. These two switches allow the user
to generate interrupts for his user-specific programs.
56858
IRQA
IRQB
+3.3V
+3.3V
10K
10K
S2
S3
0.1µF
0.1µF
Figure 2-8. Schematic Diagram of the User Interrupt Interface
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