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msp430fr4133: Error connecting to the target: unknown device

Part Number: MSP430FR4133
Other Parts Discussed in Thread: ADS1231

Hello,

   I am currently working on msp430fr4133 controller which is interface with ADS1231(external ADC) through SPI.For first 4 days code debug properly.But, yesterday when i debug a code CCS shows error:-"Error connecting to the target: unknown devices".

I checked the connectivity and JTAG connections on board and they are ok. I have tried it on different board, Initially code is debug properly  but after some time the same error occurs. .could you please tell me that why such error occur?? 

I am attaching a screenshot of my design:-

  • Hi sayali pathak,

    "Error connecting to the target: unknown devices" -- this means the connection is failed, possible hardware problem.

    What's the value of the capacitor on RST pin ? the upper limit is 1.1nF, please see Figure 7-4. Signal Connections for 2-Wire JTAG Communication (Spy-Bi-Wire) on FR4133 datasheet.

    regards
    KC

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