CHAPTER 4 BUS CONTROL FUNCTION
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User’s Manual U15195EJ5V0UD
4.3 Memory Block Function
In the V850E/IA1, the 256 MB memory space is divided into memory blocks of 2 MB and 64 MB units. The
programmable wait function and bus cycle operation mode can be independently controlled for each block.
The area that can be used as program area is the 64 MB space of addresses 0000000H to 3FFFFFFH.
In the V850E/IA2, memory space is the 4 MB space of addresses 000000H to 3FFFFFH (n = 1 to 7) because the
CSn pin has been deleted and the A0 to A21 pins have been specified as address pins.
FFFFFFFH
FFFFFFFH
On-chip peripheral I/O area (4 KB)
Internal RAM area (12 KB
Note 1
)
External memory area
External memory area
FFFC000H
FE00000H
FDFFFFFH
FFFF000H
FFFEFFFH
FC00000H
FBFFFFFH
FA00000H
F9FFFFFH
F800000H
F7FFFFFH
C000000H
BFFFFFFH
8000000H
7FFFFFFH
4000000H
3FFFFFFH
0800000H
07FFFFFH
0600000H
05FFFFFH
0400000H
03FFFFFH
0200000H
01FFFFFH
0000000H
Block 1
(2 MB)
Block 0
(2 MB)
Block 2
(2 MB)
Block 3
(2 MB)
64 MB
64 MB
Block 5
(2 MB)
Block 6
(2 MB)
Block 4
(2 MB)
Block 7
(2 MB)
3FFFFFFH
On-chip peripheral I/O area (4 KB)
Note 2
Internal RAM area (12 KB
Note 1
)
3FFC000H
3FFF000H
3FFEFFFH
00FFFFFH
Internal ROM area (1 MB)
Note 3
0000000H
CS7, CS6, CS5
Area 3
Area 2
Area 1
Area 0
CS6
CS4
CS1
CS3
CS2, CS1, CS0
Note 4
Notes 1.
Internal physical RAM: 6 KB
2.
Access to this area is prohibited. To access the on-chip peripheral I/O, specify addresses
FFFF000H to FFFFFFFH.
3.
When in ROMless mode, this becomes an external memory area.
4.
Memory space of the V850E/IA2