MC68HC908QB8 Datasheet, PDF (146/236 Pages) Freescale Semiconductor, Inc – To provide the most up-to-date information, the revision of our documents

System Integration Module (SIM)
FROM RESET
YES
BREAIKBINTTSEERTR?UPT?
NO
YES
I BIT SET?
NO
IRQ
YES
INTERRUPT?
NO
TIMER
YES
INTERRUPT?
NO
(AS MANY INTERRUPTS AS EXIST ON CHIP)
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 14-7. Interrupt Processing
MC68HC908QB8 Data Sheet, Rev. 1
146
Freescale Semiconductor