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ISO1044: software tool for stress test

Ann_Lien
Genius 10640 points
Part Number: ISO1044

Hello expert,

My customer would like to provide stress test for CAN Bus test. They would like to know what is our test setup(source, provide packet to device). Could you kindly help to check on it and let us know? Thanks a lot!!

Best regards,

Ann Lien

  • 0
    TI__Mastermind 49485 points

    Hi Ann,

    Most of our testing on ISO1044 involves applying signals directly to device including to CAN bus pins from a signal source equipment and characterizing to check if device meets all datasheet specifications like various thresholds and timings specifications across temperature. It doesn't necessarily involve an external MCU or a software tool on a PC for any continuous data transfer testing, we do not expect continuous data transfer under normal operating conditions to stress the device.

    When it comes to stressing the device, we do quite a few qualifications tests like HTOL and HAST that stress the device sufficiently under worst-case test conditions.

    What customer is referring to as stress test for CAN bus is probably relevant at an end equipment level testing to test various commands and protocols. Since we do not usually develop a complete end equipment, we do not perform any such tests.

    Let me know if this answers your question, thanks.

    Regards,
    Koteshwar Rao

  • 0 in reply to Koteshwar Rao
    TI__Genius 10640 points

    Hello Rao,

    Thanks for checking! Customer would like to know how we apply CAN Bus signal to device. Stress test for them is to keep providing packet/signal to device and check if there is packet loss. May I have your help on it? Thanks a lot!

    Best regards,

    Ann Lien 

  • 0 in reply to Ann_Lien
    TI__Mastermind 49485 points

    Hi Ann,

    We use function generator to apply signal to CAN bus. A recessive signal input needs both CANH and CANL at same common-mode voltage (we usually apply 2.5V) and a dominant signal input needs CANH to be closer to 5V and CANL to closer to 0V. Hence, applying 2.5V to 5V signal to CANH and 2.5V to 0V inverted signal to CANL will provide valid dominant and recessive signals to CAN bus.

    Like I mentioned earlier, just applying a bit stream to ISO1044 at room temp doesn't make the device stressed. To stress the device, we do various qualification tests where some of the test will have data monitor under peak temperatures and/or voltage conditions.

    A customer product is going to have an MCU running code to control many peripherals along with a CAN device and hence it becomes critical for customer to run various commands at end equipment level to see the overall product runs smooth and doesn't get stuck. Since we do not build any such end equipment ourselves and do not have an MCU with many peripherals, we do not run such tests to check program integrity.

    I hope this answers your question, thank you..

    Regards,
    Koteshwar Rao

  • 0 in reply to Koteshwar Rao
    TI__Genius 10640 points

    Hello Rao,

    Thanks for detail reply :)

    Best regards,

    Ann Lien