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Power problem in MSP430f2274

ANUP Sharma
Intellectual 310 points
Other Parts Discussed in Thread: MSP430F2274, MSP-TS430DA38, MSP-FET

Hi,

I am working on a project based on msp430f2274. My problem is that MCU is not waking up (getting ON) even if I apply power to it. this is not happening everytime.  sometimes MSP is not waking up even when  voltage  has been applied. Similarly it stops working after sometime. and sometimes it works fine. DO somebody know the reason behind this reason?

  • 0
    TI__Mastermind 22695 points

    Hi,

    I recommend you make sure your power connections are all good on your circuit and that you are following the circuits shown in the MSP430 Hardware Tools Users Guide.  The JTAG connections shown in chapter 2 (pick the diagram that matches the type of JTAG you want to use, SBW or 4-wire) show basic power filter caps as well as the required circuitry on the JTAG pins.  If you go to the schematics for the target boards (Section B) and go to the MSP-TS430DA38 (one of the target board options for the F2274) page (B.10), you can use this as reference for your complete power circuitry.

    Mike

  • 0 in reply to Mike Pridgen
    Intellectual 310 points

    i will check it. and reply accordingly.

    i want to ask one more thing , there is power coming at the VCC pin of the MCU but still no action is been made by MCU.somwtimes the it feels as if the code gets stuck up. i am using two different ICs in the project. but one (BLE) of them works while the other MCU gets stuck up.as MCU sends data to BLE,hence i am unable to receive any data. please share your view on it.

    i thought that power might be the issue but after testing it today i found out that MCU gets stuck. after long usage.

  • 0 in reply to ANUP Sharma
    TI__Mastermind 22695 points

    Hi Anup,

    ANUP Sharma said:
    i found out that MCU gets stuck. after long usage.

    Does this mean that the 430 runs correctly for a while, then quits working after some time?  If that is the case, you should use the debug features in CCS or IAR to debug your code.

    If the device never functions at all, are you at least able to connect to it by JTAG with the MSP-FET (with CCS or IAR)?  If you are, then again, you should use the debug features to correct any firmware/code issues.

    If you cannot connect to the device with the MSP-FET, then please double check your hardware connections as I mentioned in my previous post.

    Thanks,

    Mike

  • 0 in reply to Mike Pridgen
    Guru 227245 points
    An instable power supply, bad soldering or hair-cuts on the traces or insufficient buffer capacitance near the MSP may cause brownouts or similar effects. is this a custom-made board? What about a proper r/c combo at the RST pin? Crosstalk may cause a reset, if the pin is not pulled up, and if the supply isn't coming up fast, the MSP may start and crash due to still insufficient voltage when it starts.

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