MC68HC908QY4_10 Datasheet, PDF (110/168 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

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 13-7. Interrupt Processing
MC68HC908QY/QT Family Data Sheet, Rev. 6
110
Freescale Semiconductor