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Original question:

TM4C1230H6PM: PD2 interrupt not executing handler function

TM4C1230H6PM: External Interrupt for edge, or level triggered

Marvin Cantos
Expert 4685 points
Part Number: TM4C1230H6PM
Other Parts Discussed in Thread: EK-TM4C123GXL

Hi Team, 

Good day. I am posting this inquiry on behalf of the customer.

"I have one technical query regarding TM4C1230H6PMIR MCU

I am looking for some pins on MCU that work as External Interrupt for an edge, or level triggered.

As per the datasheet understanding, any Pin can be used as an interrupt right? But I want to confirm with you.

Another question was If I use External crystal, then what kind of things to be taken care of while selecting caps and crystal?"

Thank you for extending your help.

Kind regards, 

Marvin

  • 0
    TI__Guru**** 172526 points

    Hi,

    Marvin Cantos said:
    As per the datasheet understanding, any Pin can be used as an interrupt right? But I want to confirm with you

    Yes, any GPIO pins can be used as interrupts. Refer to the C:\ti\TivaWare_C_Series-2.2.0.295\examples\boards\ek-tm4c123gxl\interrupts example.

    Marvin Cantos said:

    Another question was If I use External crystal, then what kind of things to be taken care of while selecting caps and crystal?"

    Refer to the datasheet on Main Oscillator Specification for details. Below are the screenshots. 

    Also refer to the Crystal Parameters table in the datasheet where the lists of part numbers of crystals that have been simulated and confirmed to operate within the specification of the main oscillator. 

    Section 3.7 of TM4C123 System Design Guideline will be helpful as well on selecting caps for crystals. 

  • 0 in reply to Charles Tsai
    TI__Expert 4685 points

    Hi Charles, 

    Thank you for your prompt response. Please see the feedback from our customer.

    "I appreciate the detailed information you provided. 
    Is there any limit to the number of external interrupts that can be assigned to an MCU?"
    Please help to advise. Thank you for extending your support.
    Kind regards, 
    Marvin
  • 0 in reply to Marvin Cantos
    TI__Guru**** 172526 points

    Hi,

    Marvin Cantos said:
    Is there any limit to the number of external interrupts that can be assigned to an MCU?"

      The only limit is the number of GPIO capable interrupt pins in the device. You just need to refer to the datasheet on what GPIO pins are available on your selected device. They are all interrupt capable.