MC68HC908RK2 Datasheet, PDF (111/158 Pages) Motorola, Inc – Microcontroller Unit

FROM RESET
Program Exception Control
YES
BREAIKBINTTSEERTR?UPT?
NO
YES
I BIT SET?
NO
IRQ
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 10-10. Interrupt Processing
MC68HC908RK2 Data Sheet, Rev. 5.1
Freescale Semiconductor
111