Any data with the
noinit attribute will not be initialised by
the C runtime startup code, or the program loader. Not initialising
data in this way can reduce program startup times.
Any variable with the
persistent attribute will not be
initialised by the C runtime startup code. Instead its value will be
set once, when the application is loaded, and then never initialised
again, even if the processor is reset or the program restarts.
Persistent data is intended to be placed into FLASH RAM, where its
value will be retained across resets. The linker script being used to
create the application should ensure that persistent data is correctly
These attributes are the same as the MSP430 function attributes of the same name (see MSP430 Function Attributes). These attributes can be applied to both functions and variables.