Freescale Semiconductor, Inc.
System Integration Module (SIM)
Program Exception Control
FROM RESET
YES
BREAK INTERRUPT?
I BIT SET?
NO
YES
I BIT SET?
NO
YES
IRQ
INTERRUPT?
NO
STACK CPU REGISTERS
SET I BIT
AS MANY INTERRUPTS
AS EXIST ON CHIP
LOAD PC WITH INTERRUPT VECTOR
FETCH NEXT
INSTRUCTION
YES
YES
SWI
INSTRUCTION?
NO
RTI
UNSTACK CPU REGISTERS
EXECUTE INSTRUCTION
INSTRUCTION?
NO
Figure 6-9. Interrupt Processing
MC68HC908RFRK2
MOTOROLA
AdvanceInformation
91
System Integration Module (SIM)
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