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

Segment referenceDATA20_IDescriptionSegment memory typeMemory placementAccess typeHolds __data20 static and global initialized variables initialized by copying from thesegment DATA20_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.DATA0x00001–0xFFFFERead/writeDATA20_IDDescriptionSegment memory typeMemory placementAccess typeHolds initial values for __data20 static and global variables in the DATA20_I segment.These values are copied from DATA20_ID to DATA20_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.CONST0x00001–0xFFFFERead-onlyDATA20_NDescriptionSegment memory typeMemory placementAccess typeHolds static and global __no_init __data20 variables.DATA0x00001–0xFFFFERead/writePart 2. Compiler reference247