CHAPTER 3 CPU FUNCTION
User’s Manual U12688EJ4V0UM00
77
3.4.2 Image
The core CPU supports 4 GB of “virtual” addressing space, or 64 memory blocks, each containing 64 MB physical
address space. In actuality, the same 64 MB physical address space is accessed regardless of the values of bits 31
to 26 of the CPU address. Figure 3-5 shows the image of the virtual addressing space.
Because the higher 6 bits of a 32-bit CPU address are disregarded and access is made to a 26-bit physical
address, physical address x0000000H can be seen as CPU address 00000000H, and in addition, can be seen as
address 04000000H, address 08000000H, address F8000000H or address FC000000H.
Figure 3-5. Image on Address Space
FFFFFFFFH
FC000000H
FBFFFFFFH
00000000H
Internal ROM
Image
Image
Image
Internal RAM
Peripheral I/O
(External memory)
Physical address space
x3FFFFFFH
x0000000H
Image
Image
F8000000H
F7FFFFFFH
08000000H
07FFFFFFH
04000000H
03FFFFFFH
CPU address space
Summary of Contents for V850E/MS1 UPD703100
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