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Error connecting to target : unknow device

Pratiksha Bhuta
Intellectual 430 points
Other Parts Discussed in Thread: MSP430F5529, MSP430F5528, MSP-EXP430F5529LP

Hi,

     I am using MSP430F5529 lp to program a separate board having MSP430F5528 IC but everytime i try and burn the code into the borad it shows an Unknow Device error. This is a common error for 5 such boards hence i am not able to rectify the issue so if anyone has a solution for this please help me with the issue as i an new to the MSP platform. I am using CCS to burn the code into the board.

Thank you.

  • 0
    TI__Guru**** 217437 points
    Hi Pratiksha,

    This is a common error that indicates a physical hardware connection failure between the eZ-FET lite and target board. It is centered around the 2-wire JTAG (SBW) communication best explained by Figure 2-3 of the MSP430 Hardware Tools User's Guide (SLAU278): www.ti.com/.../slau278y.pdf

    You require four connections: VCC, GND, TST, and RST. They must all come from the eZ-FET lite side of the MSP-EXP430F5529LP and be as short as possible going to the MSP430F5528. You will also need an external 47 kOhm pullup resistor and 2.2 nF pulldown capacitor on the RST line. There are several similar threads on the MSP E2E that you can reference to solve your problem.

    Regards,
    Ryan
  • 0 in reply to Ryan Brown1
    Intellectual 430 points
    Hi Ryan,

    I verified the connections as per your suggestion and it works fine now. Thank you for the help.


    Thanks and Regards,
    Pratiksha Bhuta

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