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Modes 6 and 7 are single-chip modes that operate using the on-chip ROM, RAM, and registers.
All I/O ports are available. Mode 6 is a normal mode with 64-kbyte address space. Mode 7 is an
advanced mode with a maximum address space of 1 Mbyte.
The H8/3039 Series can be used only in modes 1, 3, or 5 to 7. The inputs at the mode pins must
select one of these seven modes. The inputs at the mode pins must not be changed during
operation.
3.1.2 Register Configuration
The H8/3039 Series has a mode control register (MDCR) that indicates the inputs at the mode pins
(MD
and MD
), and a system control register (SYSCR). Table 3-2 summarizes these registers.
2
0
Table 3-2 Registers
Address*
Name
H'FFF1
Mode control register
H'FFF2
System control register
Note: * The lower 16 bits of the address are indicated.
56
Abbreviation
MDCR
SYSCR
R/W
Initial Value
R
Undetermined
R/W
H'0B
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