Overview Of Bus Control; Area Partitioning - Hitachi H8S/2646 Hardware Manual

7.3

Overview of Bus Control

7.3.1

Area Partitioning

In advanced mode, the bus controller partitions the 16 Mbytes address space into eight areas, 0 to
7, in 2-Mbyte units, and performs bus control for external space in area units. In normal mode*, it
controls a 64-kbyte address space comprising part of area 0. Figure 7-2 shows an outline of the
memory map.
Note: * Not available in the H8S/2646 Series.
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
Note: * Not available in the H8S/2646.
154
Area 0
(2Mbytes)
Area 1
(2Mbytes)
Area 2
(2Mbytes)
Area 3
(2Mbytes)
Area 4
(2Mbytes)
Area 5
(2Mbytes)
Area 6
(2Mbytes)
Area 7
(2Mbytes)
(1) Advanced mode
Figure 7-2 Overview of Area Partitioning
H'0000
H'FFFF
(2) Normal mode*