Dear Mr Ladish, Thanks for replying. On the MSP432 all fields are 32 bits, so I am thinking on saving a lot of "0" bits. I want to concatenate all members in chunks of bits but I cannot have overflow. For example, here is a snapshot of the values for my particular board. Can I reduce the first and second to 8 bits and the third to 4 bits representation. And lot ID, what would be the maximum possible number? If I can get to a total of 48 bits it would be perfect. To achieve 48 bits wafer id should be the 4 MSB from the lot ID, leaving lot ID with only 28 bits representation. Do I risk "overflow" in those fields? Thanks. Regis.
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