Part numbering for MPC55xx Qorivva series

I was wondering what the M and S stand for and what their differences are. I was thinking multiprocessor vs single? Thank you!
SPC5517SBMLQ66
MPC5510KIT144-ND

Hello jrowanda1, welcome to the Techforum!
It looks like SPC5517SBMLQ66 is just the IC while MPC5510KIT144 is an evaluation board. Unfortunately I was unable to find information on the manufacturers website to confirm if the first character in the part number is referring to single or multi core.

Technical reference number T4457329

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Heres the part builder for MPC55xx MCU’s.


Source - Product Numbering Information (nxp.com)

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