HD6433045 HITACHI [Hitachi Semiconductor], HD6433045 Datasheet - Page 135

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HD6433045

Manufacturer Part Number
HD6433045
Description
Hitachi Single-Chip Microcomputer
Manufacturer
HITACHI [Hitachi Semiconductor]
Datasheet

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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.
H'DFFFF
H'BFFFF
H'1FFFF
H'3FFFF
H'5FFFF
H'7FFFF
H'9FFFF
H'FFFFF
H'C0000
H'A0000
H'E0000
Notes:
H'00000
H'20000
H'40000
H'60000
H'80000
1.
2.
3.
External address space
a.
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-Mbyte modes with
on-chip ROM disabled
(modes 1 and 2)
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 registers
On-chip RAM
* *
1, 2
*1
*3
H'DFFFFF
Figure 6-2 Access Area Map for Modes 1 to 6
H'BFFFFF
H'1FFFFF
H'3FFFFF
H'5FFFFF
H'7FFFFF
H'9FFFFF
H'FFFFFF
H'A00000
H'C00000
H'E00000
H'000000
H'200000
H'400000
H'600000
H'800000
b.
External address space
16-Mbyte modes with
on-chip ROM disabled
(modes 3 and 4)
On-chip registers
On-chip RAM
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)
* *
1, 2
*1
*3
121
H'BFFFF
H'DFFFF
H'FFFFF
H'1FFFF
H'3FFFF
H'5FFFF
H'7FFFF
H'9FFFF
H'C0000
H'A0000
H'E0000
H'00000
H'20000
H'40000
H'60000
H'80000
External address space
c. 1-Mbyte mode with
On-chip registers
on-chip ROM enabled
(mode 5)
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
On-chip ROM
* *
1, 2
*1
*1
*3
H'DFFFFF
H'BFFFFF
H'FFFFFF
H'1FFFFF
H'3FFFFF
H'5FFFFF
H'7FFFFF
H'9FFFFF
H'C00000
H'A00000
H'E00000
H'000000
H'200000
H'400000
H'600000
H'800000
External address space
d. 16-Mbyte mode with
On-chip registers
on-chip ROM enabled
(mode 6)
On-chip RAM
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 ROM
* *
1, 2
*1
*1
*3

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