MC68HC08BD24 Datasheet, PDF (89/244 Pages) Motorola, Inc – HCMOS Microcontroller Unit

FROM RESET
BREAIKBINTTSEERTR?UPT?
YES
NO
YES
I BIT SET?
NO
IRQ
YES
INTERRUPT?
NO
DDC12AB
INTERRUPT?
NO
(As many interrupts as exist on chip)
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 7-9. Interrupt Processing
MC68HC08BD24 — Rev. 1.1
Freescale Semiconductor
Technical Data
89