MC68LC040RC25A Datasheet, PDF (229/442 Pages) Freescale Semiconductor, Inc – M68040 Users Manual

Freescale Semiconductor, Inc.
ENTRY
SAVE INTERNAL
COPY OF SR
S= 1
T1, T0 ₌ 00
I2–I0 ₌ LEVEL OF
INTERUPT
FETCH VECTOR
FROM INTERRUPTING
DEVICE
IF NO VECTOR #
AUTOVECTOR 25–31
BUS ERROR
SPURIOUS INTERRUPT
VECTOR #24
8-16
IF M = 0
THEN VECTOR OFFSET,
PC, AND SR ± ACTIVE
STACK FRAME
OTHERWISE
M ± 0; VECTOR
OFFSET, PC, AND SR
± THROWAWAY
STACK FRAME ON ISP
VECTOR ± PC
BUS ERROR
PREFETCH FOUR
LONG WORDS
(DOUBLE BUS FAULT)
OTHERWISE
BEGIN INSTRUCTION
EXECUTION
BUS ERROR OR
ADDRESS ERROR
HALTED STATE
(PST3–PST0 = $5)
EXIT
EXIT
Figure 8-4. Interrupt Exception Processing Flowchart
M68040 USER’S MANUAL
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