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HET GIO wake up interrupt TMS470

Lars von Wachenfeldt
Intellectual 955 points
Other Parts Discussed in Thread: TMS470MF06607

Hi all,

after having read the Tech manual alot I still have problems understanding how to:

Select a HET pin as an GIO and then connect it to an interrupt vector (which in turn will be the sleep mode wake-up interrupt)

Anyone who has experience doing that or knows about some sample code somewhere? 

I'm using the CCS. 

Kind regards,

Lars von Wachenfeldt

  • 0
    TI__Guru 59540 points

    Hello Lars,

    Unfortunately, it is not possible to generate an interrupt with a HET pin in GIO mode. You would need to use a one of the available GIO ports for this if you need to use a GIO input signal for the wakeup.

    Since I don't know the specific device you are using, I can only speak in general terms, but normally, the wakeup sources supported are:

    – RTI interrupt

    – An external GIO Interrupt

    – CAN message

    – SCI or LIN message

    Please let me know if there are any additional questions.

  • 0 in reply to Chuck Davenport
    Intellectual 955 points

    Hi Chuck!

    Many thanks for the clarification. Yes, I also read in the tech ref the same as you say but got a bit confused when coming across this in the manual:

       4.4.2 External Wakeup Enable Register (EXTWAKENR)

               Wakeup enable. These bits correspond to 16 wakeup-capable pins on the device.

    16 pins? Anyway, I use TMS470MF06607. So this device support "only" 4 external interrupts then? I.e. GPIO/INT4-7?

    Kind regards,

    Lars

  • 0 in reply to Lars von Wachenfeldt
    TI__Guru 59540 points

    Hello Lars,

     

    I apologize for the confusion. The statement in the TRM is a general statement regarding the superset IP and points to the datasheet for the final device level support. I know this can be confusing at times but it is a document maintenance issue when customizing content for device specific information. We have tried to improve this on later documents/devices. Again, my apologies for the confusion.

    If your question has been answered, please verify the suggested answer so we can close the thread and thanks for using the TI support Forum.