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MSP430F6 programming issue _ security fuse verification failed

Rajesh Kaliyaperumal
Intellectual 930 points
Other Parts Discussed in Thread: MSP-FET

Hi All,

we are using MSP430F6xx for our application.we have manufactured several PCB. Among that one is not programming. It shows security fuse verification failed and it not even programmed one time.we have replaced the micro controller with the new one still not able to program. JTAG  connections also checked if they are soldered properly.what could be the reasons for this programming failure???

  • 0
    TI__Guru**** 219357 points
    Hi Rajesh,

    Even though the error indicates an issue with verifying the security fuse the problem actually has to do with connecting the JTAG, which is not able to communicate with the device. This is proven by the fact that two brand-new MSP430 devices are not able to be programmed using this board. However you say that several other similar PCBs have programmed the MSP430 devices correctly, so we know that your schematic and board connections are correct. Are you using 4-wire or 2-wire (SBW) JTAG? Make sure that the passive components on the RST line are the proper values and installed correctly. Even though you mention that the JTAG connections are soldered properly could this board have been subjugated to any ESD voltages? Ensure that all JTAG lines pass a continuity check.

    Regards,
    Ryan
  • 0 in reply to Ryan Brown1
    Intellectual 930 points

    Hi Ryan,

    Thank you for your suggestion.We have found the issue.The resistor on the reset line is not soldered in one end .That is why the debugger showed that security fuse failure. when attempt to program the board. After re soldering, the board is programming successfully. 

    Regards

    Rajesh

  • 0 in reply to Rajesh Kaliyaperumal
    Intellectual 660 points
    Hi Rajesh and Ryan,
    I am new to TI controllers. I tried to program my MSP430F4 series device with MSP-FET probe and FET PRO430 version 3.4. But it displayed error as:
    JTAG communication initialization.... failed
    Verifying Security Fuse .................... failed
    --------------- FAILED !!! -----------------
    it also asked me to update firmware of MSP-FET430IUF. I did it. Still the same responce. While I used MSP430 MSP-FET430UIF USB 430 Flash Emulation Tool FET debugger programme with same FET PRO430, it programmed my device.
    Can you help me to solve this?
  • 0 in reply to Prafulla Salunke
    TI__Guru**** 219357 points
    Hi Praful,

    The MSP-FET introduces slightly more capacitance on the RST/TEST lines (the cost of additional ESD protection and other benefits) which could be interfering with your connection to the target device. Are you using a TI-provided EVM or a custom PCB? Reduce your RST pull-down capacitor value or remove it completely. You should also keep the wires between the FET and target device as short as possible.

    Regards,
    Ryan
  • 0 in reply to Ryan Brown1
    Intellectual 660 points
    Thanks Ryan,
    I got your suggestion. I updated the firmware of FET and it worked.

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