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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. A chip select signal
(CS0 to CS7) can be output for each area. 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/2633 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/2633 Series.
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*
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