Hi @Shruti1 ,
Thank you for your interest in the NXP MIMXRT product, I would like to provide service for you.
You are really very good to design the RT hardware.
Answer your questions:
1. What ROM bootloader can I use? Are there some basic .bin files available?
=>Answer: ROM bootloader, in fact, you can use the tool help you directly instead of cmd method, that will be more easy to you. Tool can be SPT, MCUBootutility in serial download mode, or the JLINK as debugger. ROM bootloader is the code in the chip directly. What's the external flash you are using? QSPI flash?
SPT:
https://www.nxp.com/design/software/development-software/mcuxpresso-software-and-tools-/mcuxpresso-s...
2. And how can I program it? I saw this option:https://github.com/JayHeng/NXP-MCUBootUtility But is there an alternative with JTAG, since those are the pins we are bringing out?
=>Answer: Yes, you can use SWD(default is SWD) with debugger to download code.
MCUbootutility will download code in serail download mode with USB or the UART.
3. After programming the ROM bootloader, can I use JTAG to flash my application?
=>Answer: You don't need to download ROM bootloader. You can use the SWD debugger to flash app directly.
4. I would like to try this out on the EVKB board I have. Is that possible, or do I need a new RT1062 chip to program the bootloader?
=>Answer: No, you don't need the new chip. NXP EVKB is enough for your try.
If you have any more issues, please use your company email to create the question post instead of the 3rd part email, which will have higher support priority, thanks.
Best Regards,
Kerry
