MC68LC040RC25A Datasheet, PDF (102/442 Pages) Freescale Semiconductor, Inc – M68040 Users Manual

Freescale Semiconductor, Inc.
Table 4-4. Data-Cache Line State Transitions (Continued)
Cache Operation
Alternate Master Read Hit
(Snoop Control = 10
— Invalidate)
Alternate Master Write Hit
(Snoop Control = 10
—Invalidate)
Alternate Master Write Hit
(Snoop Control = 01
— Sink Data and
Size ≠ Line)
Invalid Cases
I10 Not Possible
I11 Not Possible
I12 Not Possible
Alternate Master Write Hit
(Snoop Control = 01
— Sink Data and
Size = Line)
I13 Not Possible
Current State
Valid Cases
Dirty Cases
V10 No action; go to invalid D10 Inhibit memory and
state.
source data; go to
invalid state
V11 No action; go to invalid D11 No action; go to invalid
state.
state.
V12 No action; go to invalid D12 Inhibit memory and
state.
sink data; set Dn bits
of modified long
words; remain in
current state.
V13 No action; go to invalid D13 No action; go to invalid
state.
state.
4-18
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