LPC55S69 : recovery boot mode ?

[EugeneHiihtaja]

Hello !

UM in chapter : "7.3.6.4.3 Bootable section"

"

The recovery boot mode on the 1B version of the LPC55S6xx that is using SB 2.1, only
supports two commands:
WriteMemory (RAM only) and Execute.

"

Could it be possible to have more details about recovery mode ?

Thank you !

Regards,

Eugene

[Alexis_A]

Hello Eugene,

Please check the following document for more information about the commands mention in the reference manual:

https://www.nxp.com/docs/en/user-guide/MCUBLHOSTUG.pdf/external-link.jspa?url=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fuser-guide%2FMCUBLHOSTUG.pdf

Best Regards,

Alexis Andalon

[EugeneHiihtaja]

Hi Alexis !

This is old version. V5 is part of SDK but there mentioned only one relevant info :

"

When flash security is enabled, only the get-property, set property, reset, flash-security-disable, and flash-erase-all-unsecure
commands are supported. The MCU bootloader returns kStatus_SecurityViolation if a command is received that is not supported
due to flash security settings.

"

but here LPC55S69 : limited ISP comands are allowed ?   different set of command mentioned.

It should be clear document what explains  ISP commands for LPC55S69 what exactly supported if secure boot enabled.

Even we go code by code, command by comand and see what finally might work some how , some part will be under suspisious

what should work and what shouldn't.

There exists reference to MCU Bootloader v2.5.0 Reference Manual but it also from 2018 and dosn't have LPC55x details.

Regards,

Eugene.