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12.1.2.3 The debugger for 740
Only the ROM area memory-mapped in the area set as Internal can be designated for software
breakpoint.
You cannot set software breakpoint in ROM areas memory-mapped in the SFR area, RAM area or
other areas set as External.
12.1.3 Get or set C variables
• If a variable is declared with the same name as the type definition name declared by typedef, you
cannot reference that variable.
• Values cannot be changed for register variables.
• Values cannot be changed for 64 bit width variables (long long, double, and so on).
• Values cannot be changed for C/C++ expressions that do not indicate the memory address and
size.
• For the sake of optimization, the C compiler may place different variables at the same address. In
this case, values of the C variable may not be displayed correctly.
• Literal character strings can only be substituted for char array and char pointer type variables.
• No arithmetic operations can be performed on floating point types.
• No sign inversion can be performed on floating point types.
• Casting cannot be performed on floating point types.
• Casting cannot be performed on register variables.
• Casting cannot be performed on structure types, union types, or pointer types to structure or
union types.
• Character constants and literal character strings cannot contain escape sequences.
• The following values can be substituted for the bit-fields.
- integer constants, character constants, and enumerators
- variables of bool types, characters types, integers types, and enumeration types
- bit-field
When the substituted value is larger than the size of the bit-field, it will be truncated.
• The bit-field member allocated in the SFR area might not be transformed into a correct value.
• While the target program is running, values of local variables and bit-fields cannot be modified.
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