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3.4.2
Image
16 images, each containing a 256 MB physical address space, are seen in the 4 GB CPU address space. In
actuality, the same 256 MB physical address space is accessed regardless of the values of bits 31 to 28 of the CPU
address. Figure 3-2 shows the image of the virtual addressing space.
Physical address x0000000H can be seen as CPU address 00000000H, and in addition, can be seen as address
10000000H, address 20000000H, ... , address E0000000H, or address F0000000H.
CPU address space
FFFFFFFFH
F0000000H
EFFFFFFFH
E0000000H
DFFFFFFFH
20000000H
1FFFFFFFH
10000000H
0FFFFFFFH
00000000H
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CHAPTER 3 CPU FUNCTION
Figure 3-2. Image on Address Space
Image
Image
Image
Image
Image
User's Manual U14492EJ5V0UD
Physical address space
FFFFFFFH
On-chip peripheral I/O
Internal RAM
External memory
Internal ROM
0000000H
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