MC68HC908LB8_05 Datasheet, PDF (179/234 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

FROM RESET
Exception Control
I BBIRTESAEKT?
INTERRUPT?
NO
YES
I BIT SET?
NO
IRQ
INTERRUPT?
NO
AS MANY INTERRUPTS
AS EXIST ON CHIP
YES
YES
STACK CPU REGISTERS
SET I BIT
LOAD PC WITH INTERRUPT VECTOR
FETCH NEXT
INSTRUCTION
SWI
INSTRUCTION?
YES
NO
RTI
YES
INSTRUCTION?
NO
UNSTACK CPU REGISTERS
EXECUTE INSTRUCTION
Figure 17-10. Interrupt Processing
MC68HC908LB8 Data Sheet, Rev. 1
Freescale Semiconductor
179