upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 67

• Manufacturer Part Number: upd70f3017ay
• Description: V850/sa1tm 32-/16-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

3.4.2 Image
locations. In actuality, the same 16 MB block is accessed regardless of the values of bits 31 to 24 of the CPU
address. Figure 3-3 shows the image of the virtual addressing space.
external physical address, the physical location xx000000H is equally referenced by multiple address values
00000000H, 01000000H, 02000000H, ... FE000000H, FF000000H.
The CPU supports 4 GB of “virtual” addressing space, or 256 memory blocks, each containing 16 MB memory
Because the higher 8 bits of a 32-bit CPU address are ignored and the CPU address is only seen as a 24-bit
FEFFFFFFH
FDFFFFFFH
FFFFFFFFH
01FFFFFFH
00FFFFFFH
FE000000H
FF000000H
02000000H
01000000H
00000000H
CPU address space
Image
Image
Image
Image
Image
Figure 3-3. Image on Address Space
CHAPTER 3 CPU FUNCTIONS
User’s Manual U12768EJ4V1UD
Physical address space
On-chip peripheral I/O
(Access prohibited)
Internal ROM
Internal RAM
xxFFFFFFH
xx000000H
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