11.3.3.1 String and Const Objects

By default, the compiler will automatically arrange for strings and const-qualified initialized variables to be allocated in the .const section which is automatically available for access from C. Specify the -mconst-in-data option to direct the compiler to allocate such objects in RAM.

For dsPIC33C/E/F and dsPIC30F devices, the .const section is allocated to a single fixed PSV page which is represented by the auto_psv memory space. Accessing the auto_psv memory space is efficient as no page manipulation is required. On these devices, additional Flash may be accessed using the techniques introduced in section Access of Objects in Program Memory, Managed PSV Access.