HD643303x Hitachi, HD643303x Datasheet - Page 122

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

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. Figure 6-2 shows a general view of the memory map.
Notes: There is no area division in modes 2 and 3.
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'00000
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
Figure 6-2 Access Area Map
External address space
1-Mbyte mode (mode 1)
On-chip I/O registers
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
107
*1, *2
*1
*1
*3