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MSPM0C1106: Can't output all pwm channels with TIMA0

bill.liao
Intellectual 325 points
Part Number: MSPM0C1106


Tool/software:

Hi, experts:

     I'm working on mspm0c1106 evk and CCS 20.3.0, create a empty project and set TIMA0 for PWM_0, use MCU package as VQFN-24(RGE), finding PA3&PA4 can't turn on led, attached is the project I created, please help to check if anything missing, thanks.

Bill1321.test_pwm.rar

  • +1
    Guru 100365 points

    PA3/4 aren't connected to the header (A1/A2/etc). There is a connection via resistors (R12/R13) which aren't populated. I can see the signal(s) on one side of the R12 and R13 locations. You should probably assign different pins for TIMA0_C3/C4.

    PA3/4 are instead connected to the 32kHz crystal (Y1). I was a little surprised that the crystal wasn't doing something, but on my board the load capacitors (C10/C12) aren't installed. (The schematic shows those as not DNC, but they were omitted anyway.)

    For completeness: I set the duty cycles for C1-C3 to 50%, and assigned C0-C3 as PA0/1/3/4. They were not set that way in your project (as imported).

    [Edit: Minor clarification.]