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Chapter 6
Instruction Cache
Preliminary User’s Manual U15839EE1V0UM00
(5)
Access to memory boundary:
If adjacent chip select (CSn) areas are a cacheable area and an uncacheable area, continuous
access across the memory boundary is possible only by using a branch instruction. Operation is
not guaranteed if the memory boundary is continuously accessed by instruction other than a
branch instruction. An example is shown below:
Suppose that the cache area settings are as shown in figure “iCache Area Setting Example”. In
this case, access to the memory areas is as follows:
• From CS0 area to CS1 area, access is possible only by using a branch instruction.
• From CS1 area to CS2 area, continuous access is possible.
Figure 6-9:
iCache Area Setting Example
CS2 area
CS1 area
CS0 area
Cacheable area
Uncacheable area
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