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programming CDCE913

Sergey Rubtsov
Prodigy 20 points
Other Parts Discussed in Thread: CDCE913

We use TI Pro Clock in local mode for I2C program CDCE913. We want: output Y1=60 MHz, Y2=0, Y3=0,  fin=20 MHz, signal source LVCMOS. After export to txt file we have the next. (See attach). After program chip we have on Y1 6,67MHz, instead of 60 MHz. What's wrong we do?

Fullscreen 0724.cdce913.txt Download 
Bit  ==>  76543210
Byte 00 - 10000001
Byte 01 - 00001001
Byte 02 - 10110100
Byte 03 - 00000011
Byte 04 - 00000010
Byte 05 - 00000000
Byte 06 - 01000000
Byte 07 - 00000000
Byte 08 - 00000000
Byte 09 - 00000000
Byte 10 - 00000000
Byte 11 - 00000000
Byte 12 - 00000000
Byte 13 - 00000000
Byte 14 - 00000000
Byte 15 - 00000000
Byte 16 - 00000000
Byte 17 - 00000000
Byte 18 - 00000000
Byte 19 - 00000000
Byte 20 - 01101001
Byte 21 - 00000010
Byte 22 - 00000000
Byte 23 - 00000000
Byte 24 - 11111111
Byte 25 - 11110000
Byte 26 - 00000010
Byte 27 - 01000111
Byte 28 - 00000000
Byte 29 - 01000000
Byte 30 - 00000010
Byte 31 - 00001000

  • 0
    TI__Expert 3985 points

    Hi Sergey,

    thank you for you interest in our device. I uploaded your .txt file in the CDCE913 and I realized that the Y1 was generating 26.6667Mhz (maybe this was a typo in your previous post). Basically you set the PLL1_0 to generate Y1=60MHz, but you are selecting S0=1 which will load the PLL1_1 setup. This one generates the 26.6667MHz.

    For more detail I attached a file with some GUI screen-shots where I highlight this not correct configuration. I also added a modified .txt file which will make the Y1 to be 60MHz in case S0=1 and tri-state if S0=0. You can further modify it if my proposed configuration does not fit with you application. By the way, what is the application where you are using the CDCE913?

    Thanks again and best regards,

    Leandro

    CDCE913_settings.pptx
  • 0 in reply to Leandro_z
    Prodigy 20 points

    Hi Leandro,

    Thank you, all works fine.

    Best regards,

    Sergey