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Compiler/TMS320F28379D: INT_MSK_SET Register : WR_MASK_SET

Part Number: TMS320F28379D

Tool/software: TI C/C++ Compiler

According technical reference document , Wait Rise interrupt is enabled  by writing 1 into WR_MASK_SET ,but WR_MASK_SET has bit fields from 5-2 does all the bits need to be set or only value 1 is enough to enable the wait rise interrupt.