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28377D PWM Digital Compare Blanking

Jon Kelm
Prodigy 210 points

On page 1540 of the TMS320F2837xD Reference Manual, it is mentioned that the blanking window in the digital compare module "will be aligned to either a CTR = PRD pulse or a CTR = 0 pulse or both CTR = PRD and CTR = 0 (configured by the DCFCTL[PULSESEL] bits)."  However, the DCFCTL register description on page 1657 only gives two possibilities for the PULSESEL bits: 0 = PRD and 1 = ZRO, with 2 and 3 being reserved.

Is it actually possible to align the blanking window to both PRD and ZRO, and if so, how can this be done?

  • 0
    TI__Guru 57255 points

    Hi Jon,

    DCFCTL[PULSESEL] = 2 corresponds to the case you are describing - align on a PRD or ZRO pulse

    I will file a bug to have the DCFCTL Register Field Descriptions on pg1657 updated.

    Thank you for bringing this to our attention and helping us find the bug!


    Thank you,
    Brett