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LP-MSPM0L1306: LP-MSPM0L1306 locked after programming with UniFlash

Part Number: LP-MSPM0L1306
Other Parts Discussed in Thread: UNIFLASH

I configured the NVM of the Device. In my application I configure the NVM at the start of the programm. I want to forbid debug access and read out of memory, but would still like to be able to reprogramm the device.

I tested it while debugging in Keil IDE and it seemed working properly. The corresponding configuration was written at the correct addresses, the calculated crc is correct and i could reprogramm the Device. To see if could still read the memory, I tested it with UniFlash. Afterwards the Device doesn't connect at all with a Debugprobe / Programmer and I get this Message.