Cpu Operating Modes; Address Space; Figure 2.1 Cpu Operating Modes; Figure 2.2 Memory Map - Hitachi H8/3062 Hardware Manual

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.
CPU operating modes
2.3

Address Space

Figure 2.2 shows a simple memory map for the H8/3062 Series. The H8/300H CPU can address a
linear address space with a maximum size of 64 kbytes in normal mode, and 16 Mbytes in
advanced mode. For further details see section 3.6, Memory Map in Each Operating Mode.
The 1-Mbyte operating modes use 20-bit addressing. The upper 4 bits of effective addresses are
ignored.
H'0000
H'FFFF
Normal mode
Normal mode
Advanced mode

Figure 2.1 CPU Operating Modes

H'00000
H'FFFFF
a. 1-Mbyte mode

Figure 2.2 Memory Map

Maximum 64 kbytes, program
and data areas combined.
Maximum 16 Mbytes, program
and data areas combined.
H'000000
H'FFFFFF
b. 16-Mbyte mode
Advanced mode
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