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LMK01801 Evaluation Board USB programming

Jens Weis
Prodigy 90 points

Other Parts Discussed in Thread: LMK01801, USB2ANY, USB2ANY-UWIRE

Hi together,

I trial to program the LMK01801 Evaluation Board via USB. I am able to communictae with the USB2ANY adapter from my PC with other TI eval. boards but not with the LMK01801 Evaluation Board.

There is an additional board in the parcel which is labeled with USB2ANY-µwire. What should I do with this board? No cables where delivered and this board is not documented.

Thanks

Jens

  • 0
    TI__Mastermind 28590 points

    You're right, there is no mention of this in the LMK01801 eval board instructions.

    Is this USB2ANY-UWIRE board the one described in (LMK04808EVM instructions) on page 76-77? It should be connected as shown there. This means you need a total of two 10 pin cables. Do you have this?

    73,
    Timothy

  • 0 in reply to Timothy T
    Prodigy 90 points

    Hi Timothy,

    we have built an additional cable. Now I am able to communicate with the DUT but the DUT is not following the instructions which I set in the tool. The output frequency is always divided by 4 and all settings I do are ignored.

    But I see that I communicate with the device. If I press Ctrl L, the output disappears for a short moment of time.

    Any Idea?

    Thanks

    Jens

  • 0 in reply to Jens Weis
    TI__Mastermind 28590 points
    Can you confirm that the jumpers are placed as illustrated in Figure 2 of EVM instructions?
    If you click the powerdown checkbox on the Bits/Pins tab, does that reduce the current to near 0?
    To confirm programming, and your cable, can you observe signal at the test points: CLKuWire_TP, DATAuWire_TP, and LEuWire_TP?

    73,
    Timothy
  • 0 in reply to Timothy T
    Prodigy 90 points

    Hi,

    the picture is as follows:

    We can set different modes via USB and can see that the current consumption of the DUT is changing as expected. For instance for powerdown the current goes down. Enabling differnt pathes the current goes up as expected. We feed the board with a reference signal, in our case 150 MHz and do not see any output signal if we control via the USB interface.

    If we control the board by hand with the EN_PIN_CTRL to high or low we can see a signal comming out of the DUT.

    What do we wrong?

    Thanks

  • 0 in reply to Jens Weis
    Prodigy 90 points
    Hi Timothy,

    any idea? Might be the device broken?

    Thanks

    Jens
  • 0 in reply to Jens Weis
    TI__Mastermind 28590 points
    When in SPI mode pin 12 becomes SYNC for CLKin0 side and pin 40 becomes SYNC for CLKin1 side. Perhaps these are asserted and it is keeping outputs in reset (i.e. no output clock.); Can you check this?

    Note you can also change state of bits SYNC1_POL_INV and SYNC0_POL_INV instead of pins.

    73,
    Timothy