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

Segment referenceDATA16_IDDescriptionSegment memory typeMemory placementAccess typeHolds initial values for __data16 static and global variables in the DATA16_I segment.These values are copied from DATA16_ID to DATA16_I 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.CONST0x0001–0xFFFERead-onlyDATA16_NDescriptionSegment memory typeMemory placementAccess typeHolds static and global __no_init __data16 variables.DATA0x0001–0xFFFERead/writeDATA16_ZDescriptionSegment memory typeMemory placementAccess typeHolds zero-initialized __data16 static and global variables. The contents of thissegment is cleared by the system startup code.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/writePart 2. Compiler reference245