Hi Jmir
No, MKE15Z256VLH7 is totally not the same as LPC chip.
But MKE15Z256VLH7 has the ROM bootloader, you can download the SDK:
https://mcuxpresso.nxp.com/en/select
The middleware select all, mcuboot
mcuboot item has the related ROM tools, eg, kinetisflashtool can download the code to the MKE15Z256VLH7 chip through UART, USB HID.
You also can use the MCUbootUtility tool to download the code through the SWD interface.
Wish it helps you!
If you still have questions about it, please kindly let me know.
Best Regards,
kerry