mcf5307cft90b Freescale Semiconductor, Inc, mcf5307cft90b Datasheet - Page 106

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

Cache Organization
A set is a group of four lines (one from each level, or way), corresponding to the same index
into the cache array.
4.8.1 Cache Line States: Invalid, Valid-Unmodified, and
As shown in Table 4-3, a cache line can be invalid, valid-unmodified (often called
exclusive), or valid-modified.
A valid line can be explicitly invalidated by executing a CPUSHL instruction.
4-8
Set 0
Set 1
Set 126
Set 127
V
0
1
1
Where:
TAG—21-bit address tag
V—Valid bit for line
M—Modified bit for line
Valid-Modified
M
0
1
x
TAG
Invalid. Invalid lines are ignored during lookups.
Valid, unmodified. Cache line has valid data that matches system memory.
Valid, modified. Cache line contains most recent data, data at system memory location is stale.
Way 0
Figure 4-3. Cache Organization and Line Format
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Table 4-3. Valid and Modified Bit Settings
V M
Freescale Semiconductor, Inc.
For More Information On This Product,
Longword 0
Go to: www.freescale.com
MCF5307 User’s Manual
Way 1
Line
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Cache Line Format
Longword 1
Description
Way 2
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Longword 2
Longword 3
Way 3
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