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TIDA-010056: unable to program the MCU when 24V external power is applied

Part Number: TIDA-010056
Other Parts Discussed in Thread: MSP-FET

Team, 

My customer built the TIDA-010056 per our design files. They are having trouble programming the MCU when external 24V power supply is applied. They can't go into debug, as it seems that something is locking up micro. If they use 3.3V from launchpad, and do not use external power supply, they can go into debug mode. 

Any ideas what could be happening? 

(Note, we have a post here, awaiting response from CCS team as well: https://e2e.ti.com/support/tools/ccs/f/81/t/864832?cm_session=30e9e2a6-364d-4ccd-87fd-b9b8b17f3c99&cm_type=link&cm_link=d5cb424b-920c-4e91-b8d0-d92563cc50ad&utm_campaign=30e9e2a6-364d-4ccd-87fd-b9b8b17f3c99&utm_medium=email&utm_source=contactmonkey&utm_content=sales%201%3a1&utm_term=RE%3a+%5bEXTERNAL%5d+1kW+48V+Motor+Drive+Reference+Design)

Thanks

Viktorija

  • Dear customer,

    we will get back to you soon. Thanks

  • Hi, Victorija, 

    Please check the board: 

    1. 3.3V voltage ripple.

    2. Reset pin R/C combination: The recommended value is 47KOhm and 1000pF. 

    3. MCU power consumption.(3.3V output current)

    If 3.3V ripple can reach 2.7V, it cannot do debug. If Reset RC filter is wrong, it cannot debug. If there is any shortcircuit arround MSP430, it cannot debug. 

    B.R
    Hawken.

  • Hi Hawken,

    I checked all parameters. They are all OK. I received MSP-FET. I tried it - no difference. I think I wasted enough time with MSP430. As I understand the power stage of TIDA-010056 board can be run from external micro. I have F280049 Launchpad board. Can you give me step-by-step instructions how to do this - any modifications on TIDA-010056 board, F280049 launchpad setup and connection to TIDA, what project to load on it, link to download the project, etc.?

    Alex Labunskiy

  • Hi, Alex, 

    1. It would be difficult to use F280049 launchpad with TIDA-010056. If you really want to use the launchpad, I suggest you to use DRV8353EVM. Please refer to 

    2. If you want to continue to setup the TIDA-010056, please send me the 1) Error page by CCS, 2) Connection picture between MSP-FET and TIDA-010056, 3) 3.3V waveform. 4) Reset and Test pin waveform when click download in CCS. 

    3. Please carefully follow the instruction below: http://www.ti.com/lit/ug/slau647m/slau647m.pdf

    B.R

    Hawken