How to update LPC5526 firmware in mass production

[_Ferrari_]

Dear all,

I develped a firmware for NXP5526 processor an now I want to update it during mass production.

I know that there is a ROM BOOTLOADER in NXP LPC552x/S2x MCUfamily so I want to use it to write firmware via USB0 in the internal empty flash.

So I have some questions

1) How to activate the ROM BOOT in the LPC552x processor family ?

2) What is the program on PC that I have to use ?

3) What is the correct procedure to update it ?

Thank you very much for your help and cooperation

best regards

[RaRo]

Hello @_Ferrari_,

Unfortunately, there is not an application note or tutorial on how to do it through USB, so please look at the LPC552x/S2x User Manual. Chapter 6. Boot ROM and Chapter 7. Secure Boot ROM, it may be useful to look at.

Also, as a recommendation, please use USB1 instead of USB0, you can look the reason behind this in this post: [LPC55] Don’t Use ISP USB0 for firmware update - NXP Community.

Finally, you could take a look at the following links:

• Use blhost to Update LPC55(S)1x Firmware through HighSpeed
• USB Firmware update compatibility wrt LPC55s69 - NXP Community

They might be useful. Hope this helps.

Best regards, Raul.