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MSP430FR5738: MSP430FR5738 schematic check

switch
Expert 2385 points
Part Number: MSP430FR5738

Hi Ti Team，

I have a headset project that uses MSP430FR5738, please help to check whether the schematic diagram is correct?

MCU board_SCH_V0P1_20210422_.pdf

  • 0
    TI__Mastermind 26420 points

    Hello,

    Overall, the schematic looks okay.  It seems the board is using a customer programming connector, so I can't confirm the exact connections for the programmer but that will be up to the customer's programming cable.  

    A few notes:

    - Port J is not interruptable.  I'm not sure what it will be used for, but wanted to point this out now.  

    - RGB LED Timer.  TB0.0 is typically used to set the PWM Period, and TB0.1 and TB0.2 are then used to set Duty cycle of PWM outputs.  In this application, all 3 channels need to be used to control Duty cycles.  There are only 2 real ways to do this: 

    1.  Run the timer in "continuous" mode, meaning it will count all the way up to 0xFFFF then overflow so period = Timer Clock/0xFFFF.  But all 3 CCRx channels will be free.  

    2.  A more involved software solution such is explained in this app note: https://www.ti.com/lit/an/slaa513a/slaa513a.pdf?ts=1619480515329&ref_url=https%253A%252F%252Fwww.google.com%252F 

    I think option 1 will probably work for this application, but I wanted to bring this up now.  

    Thanks,

    JD

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