MC68HC908AT32 Datasheet, PDF (135/378 Pages) Freescale Semiconductor, Inc – Microcontrollers

FROM RESET
YES
I BIT SET?
NO
INTERRUPT?
NO
YES
STACK CPU REGISTERS
SET I BIT
LOAD PC WITH INTERRUPT VECTOR
Functional Description
FETCH NEXT
INSTRUCTION
SWI
YES
INSTRUCTION?
NO
RTI
YES
INSTRUCTION?
NO
UNSTACK CPU REGISTERS
EXECUTE INSTRUCTION
Figure 15-3. IRQ Interrupt Flowchart
MC68HC908AT32 Data Sheet, Rev. 3.1
Freescale Semiconductor
135