7.3.2.2.2 Word Programming

The smallest block of data that can be programmed by the user is one Flash word (128 bits+ECC). The data to be word programmed must be loaded into NVMDATAx before the word programming sequence is initiated. For the word programming PROGOP, the Flash word at the location pointed to by NVMADR is programmed. Note that NVMADR is a word address, so NVMADR [3:0] is defined as 0b0000 to force Flash word alignment of the operation. To keep the contents secure, the NVMDATAx register is cleared upon completion of any Flash write operation.