mcf5307cft90b Freescale Semiconductor, Inc, mcf5307cft90b Datasheet - Page 124

• Manufacturer Part Number: mcf5307cft90b
• Description: Mcf5307 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

Cache Operation Summary
Figure 4-11 shows the three possible cache line states and possible processor-initiated
transitions for memory configured as copyback. Transitions are labeled with a capital letter
indicating the previous state and a number indicating the specific case listed in Table 4-11.
Figure 4-12 shows the two possible states for a cache line in write-through mode.
Table 4-6 describes cache line transitions and the accesses that cause them.
4-26
WI3—CPU write miss
WI5—CINVA
WI6—CPUSHL & DPI
WI7—CPUSHL & DPI
CI5—CINVA
CI6—CPUSHL & DPI
CI7—CPUSHL & DPI
Figure 4-12. Cache Line State Diagram—Write-Through Mode
Figure 4-11. Cache Line State Diagram—Copyback Mode
CD5—CINVA
CD6—CPUSHL & DPI
Invalid
V = 0
Invalid
Freescale Semiconductor, Inc.
V = 0
CD2—CPU read hit
CD3—CPU write miss
CD4—CPU write hit
For More Information On This Product,
CI3—CPU
Go to: www.freescale.com
write miss
MCF5307 User’s Manual
WI1—CPU read miss
WV5—CINVA
WV6—CPUSHL & DPI
CI1—CPU read miss
CV5—CINVA
CV6—CPUSHL & DPI
CD7—CPUSHL
& DPI
Modified
M = 1
V = 1
CD1—CPU
read miss
CV3—CPU write miss
CV4—CPU write hit
V = 1
Valid
M = 0
V = 1
Valid
WV1—CPU read miss
WV2—CPU read hit
WV3—CPU write miss
WV4—CPU write hit
WV7—CPUSHL & DPI
CV1—CPU read miss
CV2—CPU read hit
CV7—CPUSHL & DPI