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CCS/MSP430F2274: MSP430F2274 unauthorized flash memory reading

Giuseppe Lio
Prodigy 120 points
Part Number: MSP430F2274
Other Parts Discussed in Thread: MSP-FET

Tool/software: Code Composer Studio

Hi, I wish to protect my code in the MSP430F2274 devices from any kind of unauthorized memory reading. According to my understanding there are two possible ways to access the internal flash memory: the included BSL and the JTAG interface. The first question is: could the BSL in any way be used for content memory download ? If yes, how can I change the access password? For the JTAG interface I think that the answer is to blow up the fuse but I'm using the eZ430-RF2500 development kit for firmware programming and it seems that I cannot break the fuse (with both the annex IAR Embedded workbench IDE and Code composer studio). Is it correct ? Could you suggest a JTAG programmer and software that I can use to fulfill this requirement?

Many thanks for your very appreciated reply
Giuseppe

  • 0
    Guru 34743 points

    Vector space is BSL password. Unused vector locations can be populated by random data to improve protection. Connecting with wrong BSL password will mass erase main flash and info flash. It will erase also info segment A with factory calibrated data.

    For SBW fuse blow can be used any programming tool that can generate VPP (100 mA, 6-7 V) and apply it to TEST pin during SBW fuse blow sequence. For example MSP-FET.

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