MC68HC08AZ0 Datasheet, PDF (176/444 Pages) Motorola, Inc – Advance Information

Freescale Semiconductor, Inc.
External Interrupt Module (IRQ)
.
FROM RESET
YES
I BIT SET?
NO
INTERRUPT?
NO
YES
STACK CPU REGISTERS.
SET I BIT.
LOAD PC WITH INTERRUPT VECTOR.
FETCH NEXT
INSTRUCTION.
SWI
INSTRUCTION?
NO
YES
RTI
INSTRUCTION?
NO
YES
UNSTACK CPU REGISTERS.
EXECUTE INSTRUCTION.
Figure 4. IRQ interrupt flowchart
MC68HC08AZ0
174
External Interrupt Module (IRQ)
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4-irq
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