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MSPM0G3106-Q1: Interfacing with UCC33411

Harishkumar M
Prodigy 60 points

Part Number: MSPM0G3106-Q1
Other Parts Discussed in Thread: MSPM0G3106, UCC33411

Hi Team,

I am trying to interface voltage regulator UCC33411 with MSPM0G3106 MCU and i can see we have 2 input pins from MCU to UCC33411  which are Enable and Fault.

i have configured Enable as Output and Fault as input but when i do this My MCU halts and i can see the voltage at the enable is toggling between 3.3V and 0v And not sure if its because of Fault reaction and the following are the configurations i used,

DL_GPIO_initDigitalOutput(IOMUX_PINCM26);
DL_GPIO_initDigitalInput(IOMUX_PINCM16);
    DL_GPIO_initDigitalInputFeatures(IOMUX_PINCM16,DL_GPIO_INVERSION_DISABLE,DL_GPIO_RESISTOR_NONE,DL_GPIO_HYSTERESIS_DISABLE,DL_GPIO_WAKEUP_DISABLE);

DL_GPIO_clearPins(GPIOB, DL_GPIO_PIN_9);
DL_GPIO_enableOutput(GPIOB, DL_GPIO_PIN_9);

DL_GPIO_setPins(GPIOB,DL_GPIO_PIN_9); 

 

this is my config for output and input pin but after configuring this MCU crashes maybe when we suspect some fault triggered by UCC334411 to pull the MCU low. am i missing any peripheral configuration like drive strength, high z or pull up for my MCU?

We have a 27kOhm resistor between EN pin of MCU and Regulator and fault is connected to enable as shown in the snip

 image.png

What might be the problem here?

 

  • 0
    Prodigy 60 points

    Hi Team,

    Any response here,

    Because we can see that the regulator is working fine when we drive it with external VCC and a resistor 27kOhm between external VCC and the regulator enable (Removing the resistor between MCU and Regulator)

    But it crashes the core when we drive it with GPIO.