CHAPTER 3 CPU FUNCTIONS
User’s Manual U13850EJ4V0UM
89
(4) External memory
The V850/SB1 and V850/SB2 can use an area of up to 16 MB (xx100000H to xxFF7FFFH) for external memory
accesses (in single-chip mode: external expansion).
64 K, 256 K, 1 M, or 4 MB of physical external memory can be allocated when the external expansion mode is
specified. In the area of other than the physical external memory, the image of the physical external memory can
be seen.
The internal RAM area and internal peripheral I/O area are not subject to external memory access.
Figure 3-19. External Memory Area (When Expanded to 64 K, 256 K, or 1 MB)
xxFFFFFFH
xx000000H
Physical external memory
xFFFFH
00000H
Internal peripheral I/O
Internal RAM
Image
Image
Image
Internal ROM
xxFF7FFFH
xx100000H
External memory
Содержание MPD703030A
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