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TMS320F28P550SG: EPWM base address conflicts with LS8 and LS9 RAM

Julia Li
Expert 4755 points

Part Number: TMS320F28P550SG

Tool/software:

Hi Champs,

When the LS8 LS9 RAM is configured as a CLA program, its address is 0x4000~0x7FFF, which conflicts with EPWM base address. After customer testing, it was found that using this LS8~9 memory would affect their EPWM operation.

So how can we solve this issue? Thank you!

Best Regards,

Julia

  • 0
    TI__Mastermind 19896 points

    Hi,

    Three things to note here : 

    LS8,LS9 Ram are mapped to two locations - One for CPU and second for CLA.

    CPU access memories are mapped to below locations, so if CPU wants to access or setup these memories it needs to do that via the addr below before assigning it to CLA : 

    When LS8/9 are assigned to CLA then they can only be accessed below addr via program bus only : 

    If CLA reads or writes (via read/write CLA buses) then it writes to peripheral locations like EPWM in this case.

    Thanks