CHAPTER 4 BUS CONTROL FUNCTION
97
User’s Manual U14359EJ4V0UM
4.3
Memory Block Function
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.
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
Notes 1.
µ
PD703103A, 703105A:
4 KB
µ
PD703106A, 703107A, 70F3107A: 10 KB
2.
This area is access-prohibited. To access the on-chip peripheral I/O, specify addresses FFFF000H
to FFFFFFFH.
3.
When in single-chip mode 1 and ROMless modes 0 and 1, this becomes an external memory area.
When in single-chip mode 1, addresses 0100000H to 01FFFFFH become an internal ROM area.