MC68HC708MP16 Datasheet, PDF (342/398 Pages) Freescale Semiconductor, Inc – Microcontrollers

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 17-3. IRQ Interrupt Flowchart
Technical Data
342
External Interrupt (IRQ)
MC68HC708MP16 — Rev. 3.1
Freescale Semiconductor