LPCScrypt operation with Code Protect CRP1 enabled

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LPCScrypt operation with Code Protect CRP1 enabled

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gileshutchison
Contributor I

Will LPCScrypt work when code protection CRP1 is enabled. It appears to break the ability to run LPCScrypt by preventing the LPC1833 being detected as a USB device/COM port.

If this is the case, how can we Erase the Device (allowed in CRP1), so that LPC Scrypt will work again?

Thank you.

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lpcxpresso_supp
NXP Employee
NXP Employee

With CRP set to CRP1 or higher, available boot sources are restricted: If the requested boot source (either hardwired boot source from OTP or read from pins) is not one of UART0/UART3, the boot code forces booting from UART0.

So there is no way to boot into USB DFU mode (as required by LPCScrypt) on a CRP protected device. You will have to unlock over the UART using Flashmagic or similar first.

Regards,

LPCXpresso Support

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