Serialization

Look into production programmers. For example, at http://www.elprotronic.com/

The 5x series MSPs contain wafer ID and position of wafer, so this can be used as ID. The G series doesn't (one reason for the low price is the reduced effort durign production, like not individually programming the chips. Even though the G2x53 devices do have calibration values for ADC and DCO in info flash (the others of the G series don't), there is no TLV structure for this series that would hold this information.

So you'r on your own. eithe ryou compile with a different ID for each device, or you use the BSL or JTAG to program indifivual IDs into info memory using a script, or you buy the full version of the Elprotronic software which supports merging individual IDs/keys into the binary, either incremental or picking them from a text file.

Of ycourse you can also use a patch tool to change (e.g. increment) the ID in the binary before flashing each individual unit.