6.3 Operation
6.3.1 Area Division
The external address space is divided into areas 0 to 7. Each area has a size of 128 kbytes in the
1-Mbyte modes, or 2 Mbytes in the 16-Mbyte modes. Figure 6-2 shows a general view of the
memory map.
Figure 6-2 Access Area Map for Modes 1 to 6
H'00000
Area 0 (128 kbytes)
Area 1 (128 kbytes)
Area 2 (128 kbytes)
Area 3 (128 kbytes)
Area 4 (128 kbytes)
Area 5 (128 kbytes)
Area 6 (128 kbytes)
Area 7 (128 kbytes)
On-chip RAM
External address space
On-chip registers
*
1
a.
Notes:
The on-chip ROM, on-chip RAM, and on-chip registers have a fixed bus width and are accessed in a
fixed number of states.
When the RAME bit is cleared to 0 in SYSCR, this area conforms to the specifications of area 7.
This external address area conforms to the specifications of area 7.
1.
2.
3.
*
3
H'1FFFF
H'20000
H'3FFFF
H'40000
H'5FFFF
H'60000
H'7FFFF
H'80000
H'9FFFF
H'A0000
H'BFFFF
H'C0000
H'DFFFF
H'E0000
H'FFFFF
b.
H'000000
Area 0 (2 Mbytes)
Area 1 (2 Mbytes)
Area 2 (2 Mbytes)
Area 3 (2 Mbytes)
Area 4 (2 Mbytes)
Area 5 (2 Mbytes)
Area 6 (2 Mbytes)
Area 7 (2 Mbytes)
On-chip RAM
External address space
On-chip registers
*
1
*
3
H'1FFFFF
H'200000
H'3FFFFF
H'400000
H'5FFFFF
H'600000
H'7FFFFF
H'800000
H'9FFFFF
H'A00000
H'BFFFFF
H'C00000
H'DFFFFF
H'E00000
H'FFFFFF
H'000000
H'1FFFFF
H'200000
H'3FFFFF
H'400000
H'5FFFFF
H'600000
H'7FFFFF
H'800000
H'9FFFFF
H'A00000
H'BFFFFF
H'C00000
H'DFFFFF
H'E00000
H'FFFFFF
H'00000
Area 1 (128 kbytes)
Area 2 (128 kbytes)
Area 3 (128 kbytes)
Area 4 (128 kbytes)
Area 5 (128 kbytes)
Area 6 (128 kbytes)
H'1FFFF
H'20000
H'3FFFF
H'40000
H'5FFFF
H'60000
H'7FFFF
H'80000
H'9FFFF
H'A0000
H'BFFFF
H'C0000
H'DFFFF
H'E0000
H'FFFFF
1-Mbyte modes with
on-chip ROM disabled
(modes 1 and 2)
16-Mbyte modes with
on-chip ROM disabled
(modes 3 and 4)
c. 1-Mbyte mode with
on-chip ROM enabled
(mode 5)
Area 7 (128 kbytes)
On-chip RAM
External address space
*
3
On-chip registers
*
1
On-chip ROM
Area 0 (128 kbytes)
*
1
Area 1 (2 Mbytes)
Area 2 (2 Mbytes)
Area 3 (2 Mbytes)
Area 4 (2 Mbytes)
Area 5 (2 Mbytes)
Area 6 (2 Mbytes)
d. 16-Mbyte mode with
on-chip ROM enabled
(mode 6)
Area 7 (2 Mbytes)
On-chip RAM
External address space
*
3
On-chip registers
*
1
On-chip ROM
Area 0 (2 Mbytes)
*
1
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