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TPIC7218-Q1: TPIC7218-- 0X12 Register will change

chai ming
Prodigy 110 points
Part Number: TPIC7218-Q1
Other Parts Discussed in Thread: TPIC7218

software will 0X12 Register wirte only once, but activate TPIC7218 ,the 0x12 Register will change in operation, pls help advise resolve the problem. 

  • 0
    TI__Prodigy 20 points

    Hello Chai,

      I'd like to help you with this issue.  I have a few questions about your problem.  Register 0x12 contains multiple fields. Which register bits in 0x12 are you writing to change from their defaults? Which bits are getting changed later? Are they changing back to the default?
    Are you using the Watchdog, and if so, have you confirmed there are no watchdog failures? A watchdog failure may clear some SPI bits in certain cases.

    thanks,

     Ben

  • 0 in reply to Benjamin Amey
    Prodigy 110 points

    Hello Ben

             thanks for your reply , Register 0x12 changed  by 4~7bit,   we close all software interrupt,   0x12 Register will not change.

    It should be interrupt changed the 0x12 , we will check the all software. 

  • 0 in reply to chai ming
    TI__Prodigy 20 points
    Hello Chai,

    Thanks for providing an update. It sounds like something in the software was updating the register based on the interrupt. If you need any other assistance, you can reply to this thread or open a new one.



    thanks,

    Ben