Image - NEC V850/SB1TM User Manual

3.4.2 Image

The core CPU supports 4 GB of "virtual" addressing space, or 256 memory blocks, each containing 16 MB memory
locations. In actuality, the same 16 MB block is accessed regardless of the values of bits 31 to 24 of the CPU
address. The image of the virtual addressing space is shown below.
Because the higher 8 bits of a 32-bit CPU address are ignored and the CPU address is only seen as a 24-bit
external physical address, the physical location xx000000H is equally referenced by multiple address values
00000000H, 01000000H, 02000000H, ... FE000000H, FF000000H.
CPU address space
FFFFFFFFH
FF000000H
FEFFFFFFH
FE000000H
FDFFFFFFH
02000000H
01FFFFFFH
01000000H
00FFFFFFH
00000000H
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CHAPTER 3 CPU FUNCTIONS
Figure 3-6. Image on Address Space
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User's Manual U13850EJ4V0UM
Physical address space
xxFFFFFFH
Internal peripheral I/O
Internal RAM
(Access prohibited)
Internal ROM
xx000000H