Hello Ilias Karakiritsis,
From my understanding, you want to load two executable projects to one chip. Right? I don't think we have this kind of pure C demo project for HCS12. We have Bootloader+app asm mixed demo project
The philosophy of the boot-loader is described in the AN2295 - Developer’s Serial Boot-loader M68HC08 and HCS08 MCUs or AN2548 Serial Monitor Program for HCS12 MCUs.
You should be able to perform search these two documents and demo projects from our website
NXP Semiconductors | Automotive, Security, IoT
Have a great day,
Jennie Zhang
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