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TMS320F280049C: CLB HLC trigger behavior

LIU LIU
Intellectual 350 points
Part Number: TMS320F280049C

From the introduce of TRM，the option to trigger the execution of instructions using both falling edge and rising edge is available.

Can I set HLC trigger edge？So that I can choose the a valid trigger edge from rising edge, falling edge or both edge.

  • 0
    TI__Guru 50511 points

    Hi,

    The subject matter expert is out of office due to holiday break. Please expect response by 1st week of January. Sincere apology for inconvenience.

    Regards, Santosh

  • 0
    TI__Genius 14011 points

    Hi Liu Liu,

    Can you send a screenshot of what part of the TRM you are referring to? Typically, the HLC only accepts rising edge triggers to run HLC programs. You could invert the signal using a LUT or OUTLUT if you want to implement falling edge detect, and similarly if wanting to implement both edge detect. Type 2 and later CLBs actually have access to both natural and inverted signals from the OUTLUTs. This might be what is referred to in the TRM, but I would need to see the exact section

    Regards,

    Peter

  • 0 in reply to Peter Luong1
    Intellectual 350 points

    screenshot is below.

  • +1 in reply to LIU LIU
    TI__Genius 14011 points

    Hi Liu Liu,

    Thank you for the screenshot. Yes, the Type 2 CLBs and later have access to the INVERTED signals from the the OUTLUT, which can be used to implement falling edge detect on the trigger signals. This feature isn't available on Type 1 CLBs (the HLC on Type 1 CANNOT use the output of the OUTLUTs as trigger signals). The INVERTED signals are shown in the CLB tool as below:

    Regards,

    Peter