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TMS320F280049: question about LFU

Part Number: TMS320F280049
Other Parts Discussed in Thread: TIDM-02011

Hi Expert,

My customer want to use F280049 to implement LFU without reset.

there have question below:

1. in customer's code, there have a function to initialize variables inside main function, in power reset or watchdog reset, the code will run this function to initialize all variables that required.

but for LFU switch and the code jump to another bank, then it should skip initialization of these variables, how to handle this function that initialize variables differently when CPU reset and not reset ?

2. Any specific timing requirement for LFU implementation? Like C runtime initialization time, Control ISR frequency and idle time, LFU switch time, any limitation?

  • Hello,

    1. Please refer to our LFU reference design TIDM-02011. We have reference software explaining how to do this, as well as documentation in the design guide TIDUEY4.

    2. This is  really specific to your application. How much idle time you have between interrupts governs the permitted time to complete the LFU switchover. We cover these aspects as well in TIDUEY4.

    Thanks,

    Sira