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TDA2SX: TDA2SXBTQABCRQ1

Pingjiao Lee
Prodigy 30 points
Part Number: TDA2SX
Other Parts Discussed in Thread: TDA2

1. The state of TDA2Sx watchdog in the TRM is, the device includes one watchdog timer. While in the datasheet of TDA2Sx, the state is that the device has two watchdog timers. Why?

2. How many watchdogs in TDA2Sx? And which modules does these watchdog monitoring? Our company used the TDA2 module classification in the safety manual Chapter 3.8. Maybe you can give a list of watchdog in TDA2SX and their corresponding monitoring module (modules refer to safety manual Chapter 3.8).

thank you！

  • 0
    TI__Expert 4015 points

    Section 4.3.6 from the TRM clarifies this:

    "The MPU watchdog timer (MPU_WD_TIMER) implements two channels, one per MPU core (MPU_WD_TIMER_C0 and MPU_WD_TIMER_C1, respectively"

    So there is "one" watchdog timer with 2 independent channels.  Each one has an independent period with its own interrupts, so effectively it is like having two timers.  I'm not sure what you mean by corresponding monitoring module.  Could you specify what safety manual you are referring to?

    Regards,

    Zack

  • 0 in reply to z
    Prodigy 30 points

    The safety manual is TDA2_TDA2P_DRA7_safety_manual_spruii9

    Thank you!

  • 0 in reply to Pingjiao Lee
    TI__Expert 4015 points

    The watchdog timers in TDA2 do not correspond to any monitoring module, so I'm not sure what your question is.  As the safety manual says in section 3.8.3.2:

    "The watchdog is a traditional single-threshold watchdog. The user programs a reload value to the watchdog, and must provide a predetermined “pet” response to the watchdog before the timeout counter overflows. Overflow of the timeout counter triggers an error response. The watchdog can issue either an internal (warm) system reset or a CPU interrupt upon detection of a failure."

    So it's unrelated to the other modules in section 3.8.  Let me know if you have any other questions.

  • 0 in reply to z
    Prodigy 60 points

    the first question : how many watch dog timer and its location is at which module for TDA2SX?

  • 0 in reply to Fu Super
    TI__Expert 4015 points

    There are actually 2 watchdog timers.  The one I reference above is in the MCU domain, and is described in section 4.3.6 of the device TRM.  The other is the system watchdog timer, and is in the PD_WKUPAON power domain.