https://www.nxp.com/docs/en/user-guide/AN2353.pdf
Covers the MCF523x, MPC5500, MPC5600, MPC5700, MPX40 and all eTPU-equipped Devices
https://www.nxp.com/docs/en/application-note/AN2864.pdf
Runs on MPC5674F evaluation board and demonstrates the usage of Engine Control eTPU Library
https://www.nxp.com/docs/en/application-note/AN4908.pdf
Covers all MPC5500, MPC5600, and MPC5700 Devices Featured with the Enhanced Time Processing Unit (eTPU)
https://www.nxp.com/docs/en/application-note/AN4907.pdf
https://www.nxp.com/docs/en/application-note/AN2863.pdf
https://www.nxp.com/docs/en/application-note/AN3768.pdf
https://www.nxp.com/docs/en/application-note/AN2848.pdf
https://www.nxp.com/docs/en/application-note/AN2821.pdf
https://www.nxp.com/docs/en/application-note/AN2857.pdf
https://www.nxp.com/docs/en/user-guide/AN2897.pdf
http://ashware.ddns.net/CodeBuilder/eTPU_code_builder.aspx
Links to code snippets and software
Using Enhanced Time Processing Unit (eTPU/eTPU2) for Combustion Engine Management and Electric Motor Control
https://www.nxp.com/docs/en/supporting-information/WBNR_FTF10_AUT_F0447_PDF.pdf
Some of these links require login and therefore aren't linked indivudually
https://www.nxp.com/products/no-longer-manufactured/enhanced-time-processor-unit-archive:eTPUArchive