The term "MCX Boot ROM Image (Top)" likely refers to firmware or development tools related to NXP's (a newer line of Arm® Cortex®-based MCUs). However, it appears there may be confusion regarding the terminology. Below is an analysis and guidance on resolving the query.
The keyword specifically refers to the code extracted from the original MCPX chip (revision A or B). These images are roughly 4KB to 32KB in size, though the vast majority of the boot code is stored in the ROM, with only a tiny stub (the "bootrom") being extractable via hardware glitching or decapping. download mcpx boot rom image top