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CDCE62005: Configuration dose not work outputs do not change

Guido Smely
Prodigy 20 points

Part Number: CDCE62005

After Fixing the SPI issiu I had now I have the problem that the configuration I loaded via SPI into the chip does not get applied.

Reading the chip works i get the default configuration as answer.
But when writing:

0x81860320,
0x81020301,
0x81040302,
0x68840303,
0x81840314,
0x10000A45,
0x04BE24F6,#tried with and without it
0xBD90FBF7,

0x80BE24F6,
0x84BE24F6,#toggle the 6 22 for VCO recallibartion after Configuration change
0x80BE24F6

to the chip the default configuration stayes applied what also is interesting is that the outputs do not turn of eventhough they should when recalllibration the VCO. Maybe ther is a timing constraint on toggle time?

  • 0
    TI__Prodigy 300 points

    Hello Guido,

    We have a board here that we can take a look at and try to determine what the cause of SPI not writing correctly is. I will take a look on my end get back to you by Monday.

    Best,
    Brian

  • 0 in reply to Brian Mace
    TI__Prodigy 300 points

    Hello Guido, 


    Sorry for the delay - I have the board in hand and am working on bring it up. I have the board up and running, and am currently debugging the SPI interface. I will let you know if I am able to replicate your concern or determine the issue. 

    Best,

    Brian

  • 0 in reply to Brian Mace
    TI__Prodigy 300 points

    Hi Guido,

    I'm having trouble with our older interfaces and need to install some different software. I will get back to you ASAP with more updates once I am able to replicate your setup as best I can

  • 0
    Prodigy 20 points

    Hi Brian,
    thanks for your effort I hade some problems with my mail account.
    For your information I am not using the developer board i am trying to programm the chip directly on PCB.
    Do to a PCB design flaw I hade the Chip in test mode maybe that broke something I dont know.
    But it would help if you could tell me if it works with this configuration at all. I used the provided configuration software saved the init file and copied the register configurations from there and than added the toggle operation manually after finding out that it is necessary.
    Just so you understand my process better.
    Thankfull Regards,
    Guido.

  • 0 in reply to Guido Smely
    TI__Expert 4700 points

    Hi Guido,

    we will look into this issue and get back to you early next week 

    Best,

    Sandra 

  • +1
    TI__Prodigy 300 points

    Hello Guido,

    Are you using the stand-alone GUI from TI.com? I don't see that register combination working on my end, but frankly I have never worked with this specific part before. Can I ask what application you are using this for? (What frequencies, etc.)

    Best,

    Brian

  • 0 in reply to Brian Mace
    Prodigy 20 points

    Hello Brian,
    Sorry for my late reply. I did not get a notification.

    Ah ok, it is at least good to know that it is not a chip problem but that the configuration seems to be wrong.

    The software I used is the GUI provided by Texas Instruments. In the picture you can see the needed frequencies. The use case is a frequency synthesizer for a frequency division multiplexer.

    Frequencies:
    218, 180, 135, disabled, 270.

    I tried a lot and can't get the config to stick. In the datasheet it says on reprogramming the chip you need to recalibrate the VCO. That was my last straw; this didn't work either.

    I tried to write the new config to EEPROM in the hopes it would boot up with it. This did not work either.

    Guess the next step is not trusting the GUI program and calculating all ratios and the register configs by hand .....

    If you can't get my config to run, could you send me a config that does work on your end that is not the standard config so I could at least validate that my communication with the chip works and the chip works?


  • 0 in reply to Brian Mace
    Prodigy 20 points

    Sorry Accdentally presst the this resolved my issu button how can i Revert it I wanted to send you the INI file because I forgot.I cant upload the file but here is the text:
    REGISTERS
    0    81860320
    1    81020301
    2    81040302
    3    68840303
    4    81840314
    5    10000E45
    6    04BE24F6
    7    BD90FBF7
    8    20009D98

    PORTS
    0    9D
    1    FF
    2    DF
    3    F9

    INPUTS
    PRI    10
    SEC    0
    AUX    25

    EXTERNAL COMPONENTS
    C4    1
    R4    1
    C5    1

  • 0 in reply to Guido Smely
    TI__Expert 4700 points

    hi Guido,

    We will look into this and get back to you by next week.

    thanks for you patience as we work together on resolving the issue.

    Best,

    Sandra 

  • 0 in reply to Sandra Saba
    Prodigy 20 points

    Hi Sandra,
    thanks for your continuing support any new insights?
    Greetings,
    Guido

  • +1 in reply to Guido Smely
    TI__Prodigy 300 points

    Hi Guido,
    Sorry for the delay again. i've been messing with the profile, and nothing I see is causing any issues. Can you try with these register settings? Similarly, have you done the frequency planner using the GUI? You should be able to use that and just select different frequencies to confirm communication

  • 0 in reply to Brian Mace
    Prodigy 20 points

    Hi Brian,
    thanks for the config. Yes I used the frequezy calculator tool Provided by the GUI it is very interesting that you obtained so different results.
    Thanks you very much for the config I will try it on my end but it is very helpfull to know that this config should work.

    Greetings,
    Guido.

  • 0 in reply to Brian Mace
    Prodigy 20 points

    Thanks Brian this helped me find the issue knowing the konfig was correct helped me find the error in my SPI interface read and write where not configuered the same thats why could read but writing was. I even got my first config running thanks for all the help.

    Thankfull Greetings ,
    Guido.