Freescale Semiconductor MC68HC908MR16 Datasheet page 188

System Integration Module (SIM)
AS MANY INTERRUPTS AS EXIST ON CHIP
188
FROM RESET
BREAK OR SWI
I BIT SET?
INTERRUPT?
NO
YES
I BIT SET?
NO
INTERRUPT?
NO
FETCH NEXT
INSTRUCTION
SWI
INSTRUCTION?
NO
RTI
INSTRUCTION?
NO
Figure 14-8. Interrupt Processing
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
YES
YES
STACK CPU REGISTERS
SET I BIT
LOAD PC WITH INTERRUPT VECTOR
YES
YES
UNSTACK CPU REGISTERS
EXECUTE INSTRUCTION
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