HD6475348R Datasheet, PDF (52/487 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

3.1.2 Address Space
The address space size depends on the operating mode.
The H8/534 or H8/536 MCU has five operating modes, which are selected by the input to the
mode pins (MD2 to MD0) when the chip comes out of a reset. The CPU, however, has only two
operating modes. The MCU operating mode determines the CPU operating mode, which in turn
determines the maximum address space size as indicated in figure 3-1.
CPU operating mode
Minimum mode
Maximum mode
Maximum address space: 64 kbytes
Hightest address: H'FFFF
Maximum address space: 1 Mbyte
Hightest address: H'FFFFF
Figure 3-1 CPU Operating Modes
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