MSP430 IAR C/C++ Compiler reference guide - Rice University

Descriptions of segmentsDATA16_CDescriptionSegment memory typeMemory placementAccess typeHolds __data16 constant data.CONST0x0001–0xFFFERead-onlyDATA16_HEAPDescriptionSegment memory typeMemory placementAccess typeHolds the heap used for dynamically allocated data in data16 memory, in other wordsdata allocated by malloc and free, and in C++, new and delete.DATAThis segment must be placed in the first 64 Kbytes of memory.Read/writeSee also The heap, page 39 and New and Delete operators, page 106.DATA16_IDescriptionSegment memory typeMemory placementAccess typeHolds __data16 static and global initialized variables initialized by copying from thesegment DATA16_ID at application startup.This segment cannot be placed in memory by using the -P directive for packedplacement, because the contents must be continuous. Instead, when you define thissegment in the linker command file, the -Z directive must be used.DATA0x0001–0xFFFERead/write244MSP430 IAR C/C++ CompilerReference Guide