Atmel CAVR-4 사용자 설명서

CAVR-4

C++ and memory types

Reference Guide

In short: 

A C++ class object is placed in one memory type, in the same way as for normal C 
structures. However, the class members that are considered to be part of the object are 
the non-static member variables. The static member variables can be placed individually 
in any kind of memory.

Remember, in C++ there is only one instance of each static member variable, regardless 
of the number of class objects.

Also note that for non-static member functions—unless class memory is used, see 
Classes, page 111—the 

this

 pointer will be of the default data pointer type. This means 

that it must be possible to convert a pointer to the object to the default pointer type. The 
restrictions that apply to the default pointer type also apply to the 

this

 pointer.

int _ _flash * e;

A pointer stored in default memory. The pointer 
points to an integer in flash memory.

int _ _flash * _ _eeprom f;

A pointer stored in eeprom memory pointing to 
an integer stored in flash memory.

int _ _eeprom * myFunction(

   int _ _flash *);

A declaration of a function that takes a 
parameter which is a pointer to an integer stored 
in flash memory. The function returns a pointer 
to an integer stored in eeprom memory.

int

The basic type is an integer.

int _ _flash

The integer is stored in flash memory.

int _ _flash *

This is a pointer to the integer.

int _ _flash * _ _eeprom

The pointer is stored in eeprom memory.