MC68HC08AS20 Datasheet, PDF (172/386 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

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 14-2. IRQ Interrupt Flowchart
Advance Information
172
MC68HC08AS20 —Rev. 4.1
Freescale Semiconductor