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F29H850TU: Where are the EQEP pins on the F29H85x?

Jerome
Prodigy 150 points
Part Number: F29H850TU

Tool/software:

Hello,

I want to route the EQEP on the F29H850TU, and found no indications as where they are.

Usually, they are shown up in the Pin Assignation Table.
Example from TMS320F28P650:

With the F29H85x datasheet, there are no "QEP" mention anywhere in that table.

Both devices have Type 2 eQEP, so I do not suspect major difference.

Both documentations shows the EQEP signals are coming trough the GPIO MUX:

In the GPIO MUX documentation, there seems to be no special mention of the EQEP, implying it is "just another peripheral to select".
I have digged in both datasheet and TRM and found nothing.

Where are EQEPx_INDEX, EQEPx_A and EQEPx_B pins on the F29H850TU ???

Thanks!

  • 0
    Prodigy 150 points

    I found this in the TRM:

    There seems to be a way to connect the GPIOs to EQEP trough the Input X-BAR.

    I'm completely new to this, but my understanding is that any GPIO can be assigned to any XBAR signal, then to the peripheral.

    Example, GPIO12 can be assigned to XBAR Input 33 by setting INPUTSELECT_33 register to "12".
    Since XBAR input 33 is connected to EQEP1_A, then initialising the EQEP1 will take the input from there.

    Is that it?

  • +1
    TI__Mastermind 26166 points

    Hi Jerome,

    This is a literatue bug that needs to be updated. Instead of GPIO mux, you'll have to refer to the inputxbar table for these inputs.

    INPUTXBAR 33-56 will have the inputs to the eQEP, which can come from any GPIO.

    Thank you for bringing this to our attention.

    Best,

    Ryan Ma