Hi @osama_desoqi
For the processors our toolbox offers support for, MBDT delivers default configuration projects (in both EBT and S32CT), for ensuring an initial starting point in terms of hardware setup, i.e. peripherals, pins, and clocks configuration. These configurations are created based on the NXP's evaluation boards that we have used for development and testing.
When you selected the S32K311 processor inside the model's Hardware Settings, such a default configuration project, targeting S32K311 processor, was brought next to the model and used for the build process. However, since the S32K311-Q100EVB is not officially supported by MBDT for S32K3 1.5.0 (in terms that we do not provide a configuration tageting such an evaluation board), the UART component, necessary for PIL Serial communication, is not configured.

However, this is not a limitation, as you can customize this configuration project to target your hardware, by configuring the UART hardware instance, according to the board's schematic, pins, clocks, and interrupts, inside the .mex file. For a step by step tutorial on how this can be achieved, please check the following article
Moreover, I would like to mention that MBDT for S32K3 1.6.0, which will be released at the beginning of next year, will offer such a configuration for S32K311-Q100EVB and will have the application examples it delivers tested and validated on this hardware as well.
Please let us know if you encounter any issues in enabling an UART instance for establishing PIL communication on S32K311.
Regards,
Irina