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LMK01801: LMK01801 - register readback

Sunset
Genius 13505 points
Part Number: LMK01801

Hello Team,

do we have a way to read back the register from the LMK01801?

What would you recommend to make sure that the registers are written properly?

Thanks,

SunSet

  • 0
    TI__Mastermind 27661 points

    Sunset,

    No, we do not have a way that I know of to do this.

    However, often when people ask this, they want to verify that the part is responding to programming commands.  Typically what we do is toggle a bit like POWERDOWN and see the impact on current consumption.

    Regards,

    Dean

  • 0 in reply to Dean Banerjee
    TI__Genius 13505 points

    Hello Dean,

    thanks for the confirmation.

    The problem is that the part in not responding on the commands right.

    The LMK is already on the prototype and they are debugging it.

    We have to leave with the fact that there is no read back.

    Thanks,

    SunSet

  • 0 in reply to Sunset
    TI__Mastermind 27661 points

    Sunset,

    Although readback is one way to check that your programming is working, there are alternatives like the powerdown/powerup approach.

    For programming issues, the most common reason it doesn't work is:

    1. Part is powered down by pin

    2.  filters are put on programming lines and very bad slew rate on inputs.

    Regards,

    Dean

  • 0 in reply to Dean Banerjee
    TI__Genius 13505 points

    Hello Dean,

    thanks for the additional notes.

    Regarding the powerdown/powerup I was thinking you meant that you check the power down bits and see the current change, but you may mean something else. Can you better explain what you would test with "powerdown/powerup debugging"?

    Thanks,

    SunSet

  • 0 in reply to Sunset
    TI__Genius 9920 points

    Troubleshooting steps:

    1, Power

    2, Power on pin status ( SYNC0,SYNC1, EN_PIN_CTRL) : default setting, Low on SYNC pin would mute all outputs.

    3, Serial MICROWIRE Timing

    4, Try to turn on or off one output

  • 0 in reply to Shawn Han
    TI__Genius 13505 points

    Thanks for the additional information.

    Some boards are working so there is some "subtle" problem.

    We are debugging it.

    Upon I will have more info or additional challenges I will address it.

    Thanks,

    SunSet