Operation; Area Division; Memory Map - Hitachi H8/3022 Hardware Manual

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 mode and 2 Mbytes in the 16-Mbyte mode. Figure 6-2 shows a general view of the

memory map.

H'00000
Area 0 (128 kbytes)
H'1FFFF
H'20000
Area 1 (128 kbytes)
H'3FFFF
H'40000
Area 2 (128 kbytes)
H'5FFFF
H'60000
Area 3 (128 kbytes)
H'7FFFF
H'80000
Area 4 (128 kbytes)
H'9FFFF
H'A0000
Area 5 (128 kbytes)
H'BFFFF
H'C0000
Area 6 (128 kbytes)
H'DFFFF
H'E0000
Area 7 (128 kbytes)
On-chip RAM
External
address space
On-chip
I/O registers
H'FFFFF
a. 1-Mbyte modes with
on-chip ROM disabled
(mode 1)
Notes: There is no area division in mode 7.
1. The number of access states to on-chip ROM, on-chip RAM, and on-chip I/O registers is fixed.
2. This area follows area 7 specifications when the RAME bit in SYSCR is 0.
3. This area follows area 7 specifications.
H'000000
Area 0 (2 Mbytes)
H'1FFFFF
H'200000
Area 1 (2 Mbytes)
H'3FFFFF
H'400000
Area 2 (2 Mbytes)
H'5FFFFF
H'600000
Area 3 (2 Mbytes)
H'7FFFFF
H'800000
Area 4 (2 Mbytes)
H'9FFFFF
H'A00000
Area 5 (2 Mbytes)
H'BFFFFF
H'C00000
Area 6 (2 Mbytes)
H'DFFFFF
H'E00000
Area 7 (2 Mbytes)
*1,*2
On-chip RAM
External
*3
address space
On-chip
*1
I/O registers
H'FFFFFF
b. 16-Mbyte modes with
on-chip ROM disabled
(mode 3)
Figure 6-2 Access Area Map (Mode 1, 3, and 5)
H'00000
On-chip ROM
Area 0 (128 kbytes)
H'1FFFF
H'20000
Area 1 (128 kbytes)
H'3FFFF
H'40000
Area 2 (128 kbytes)
H'5FFFF
H'60000
Area 3 (128 kbytes)
H'7FFFF
H'80000
Area 4 (128 kbytes)
H'9FFFF
H'A0000
Area 5 (128 kbytes)
H'BFFFF
H'C0000
Area 6 (128 kbytes)
H'DFFFF
H'E0000
Area 7 (128 kbytes)
*1,*2
On-chip RAM
External
*3
address space
On-chip
*1
I/O registers
H'FFFFF
c. 1-Mbyte mode with
on-chip ROM enabled
(mode 5)
H'000000
*1
On-chip ROM
Area 0 (2 Mbytes)
H'1FFFFF
H'200000
Area 1 (2 Mbytes)
H'3FFFFF
H'400000
Area 2 (2 Mbytes)
H'5FFFFF
H'600000
Area 3 (2 Mbytes)
H'7FFFFF
H'800000
Area 4 (2 Mbytes)
H'9FFFFF
H'A00000
Area 5 (2 Mbytes)
H'BFFFFF
H'C00000
Area 6 (2 Mbytes)
H'DFFFFF
H'E00000
Area 7 (2 Mbytes)
*1,*2
On-chip RAM
External
*3
address space
On-chip
*1
I/O registers
H'FFFFFF
d. 16-Mbyte modes
(mode 6)
*1
*1,*2
*3
*1
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