3.1.2 Address Space
The address space size depends on the operating mode.
The H8/532 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.
Minimum mode
CPU operating mode
Maximum mode
Maximum address space: 64 k
bytes Hightest address: H'FFFF
Maximum address space: 1 M byte
Hightest address: H'FFFFF
Figure 3-1 CPU Operating Modes
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