HD6433044 Datasheet, PDF (32/867 Pages) Hitachi Semiconductor – Hitachi Single-Chip Microcomputer

2.2 CPU Operating Modes
The H8/300H CPU has two operating modes: normal and advanced. Normal mode supports a
maximum 64-kbyte address space. Advanced mode supports up to 16 Mbytes. See figure 2-1.
The H8/3048 Series can be used only in advanced mode. (Information from this point on will
apply to advanced mode unless otherwise stated.)
CPU operating modes
Normal mode
Maximum 64 kbytes, program
and data areas combined
Advanced mode
Maximum 16 Mbytes, program
and data areas combined
Figure 2-1 CPU Operating Modes
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