topic Re: NBU functions in MCX Microcontrollers

NBU functions

Chan_17 — Thu, 14 Aug 2025 07:49:14 GMT

Hello NXP team,
I am using bare KW45 bare MCU and for enabling Radio core for flashing NBU image and Cm33 image I referred AN14003 Rev. 1.1 but I have some queries with respect to function mentioned in the document .
1.Function JiaTest_Set_LifeCycleAndKeys_Secure use program the fuse but in the definition of the function there is no reference present for the specific variable which is &TestContextForWriteLC , how to succesfully build the project if reference is not present and why reference is not present for the specific variable.
2. I have noticed there is no #if defined in specific part but # endif is present.
NOTE you can find reference of the function in page number 11 and 12 of the document

Re: NBU functions

Chan_17 — Thu, 14 Aug 2025 07:51:01 GMT

attached screenshots

Re: NBU functions

luis_maravilla — Fri, 15 Aug 2025 16:34:02 GMT

Hello,

The initialization for the context is shown in figure 9 chapter 5.2.1 before the SB3KDK and RoTKTH keys.

You can enter context name: nboot_context_t TestContextForWriteLC; for example.

This is something every customer would need to implement by their side with his own context name.

Best Regards

Luis