MC68HC08AS32A Datasheet, PDF (138/296 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
External Interrupt (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
YES
INSTRUCTION?
NO
RTI
YES
INSTRUCTION?
NO
UNSTACK CPU REGISTERS
EXECUTE INSTRUCTION
Figure 8-4. IRQ Interrupt Flowchart
Data Sheet
138
External Interrupt (IRQ)
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MC68HC08AS32A — Rev. 1
MOTOROLA