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TCAN1144-Q1: TCAN1144-Q1 LIMP

Carsten Koeck
Prodigy 420 points
Part Number: TCAN1144-Q1

Tool/software:

I have a question regarding the tcan1144-Q1 which I it is a bit strange to me.

 

Is the internal watchdog really disable after power on sequence? This is what I read but I am not sure because for us that means that  the external WD will not be able to reset the microcontroller in case of the SW will get an issue during the start-up routine.

 

 

15h à 00010101b

 

 

 

PIN 6 is not getting a low level during 300ms after WD event (when CS is high) as expected.

Any help will be highly appreciated

BR

Carsten

  • 0
    TI__Guru 74282 points

    Carsten,

    Yes, the watchdog is disabled by default, and must be configured, then serviced correctly once for it to start working. And did you mean pin 7? I assume so based on the title of the thread and subject matter, but I want to confirm. And for the data you are writing, it says 15h, but did you mean 13h? That is the WD configuration register, and if you wrote 00010101b to register 13h, that would set the WD failure act to be setting the interrupt, which would drive nINT low while nCS was high.

    Please confirm all the questions and assumptions I made, and let's see if we can solve this.

    Regards,

    Eric Hackett