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CDCE6214Q1TM: How to perform the initialization configuration for the CDCE6214Q1TM？

Felix fugang
Prodigy 10 points
Part Number: CDCE6214Q1TM


Tool/software:



HI ti

The CDCE6214Q1TM clock generator is used to provide one differential clock and one single-ended clock for FPGA，clk input is 50MHz via the SECREF_P 

1，Is the design of the circuit shown in the diagram correct?
2，When i write the register via the I2C bus，but CDCE6214Q1TI address（0x68） is no ack ，where is the problem， how can i debug？

ooking forward to your reply，tks！

  • 0
    TI__Mastermind 23330 points

    Felix,

    Per the datasheet, CDCE6214Q1TM does NOT have I2C access with the default EEPROM configuration unless you start in fall-back mode (HW_SW_CTRL and REFSEL floating or pulled to middle level):

    Thanks,

    Kadeem

  • 0 in reply to Kadeem Samuel
    Prodigy 10 points

    Hi Kadeem
    Thank you very much for your reply.According to your guidance, the I2C can respond now.
    However, I have written the register configuration that I need, but the CDCE6214Q1TM doesn't have any output.
    clock configuration is shown in the following figure.







    By the way, my main control chip is  FPGA.
    the list of registers that have been written.Could you please help me check my register configuration is it correct?

    0x02  h0002

    0x18  h0001

    0x19  h0002

    0x1E  h0062

    0x20  h004d
    0x1F  h62fe
    0x22  h00fe
    0x21  h8f8e

    0x38  h0019
    0x2f   h0004

    0x3B  h2800
    0x4B  h8000

    In addition, is there any requirement for the sequence of writing these registers?

  • 0 in reply to Felix fugang
    TI__Mastermind 23330 points

    Felix,

    There is not a sequence, though they should recalibrate the PLL after writing all other registers.

    How do they have the GPIO pins configured, both on the board and in the User Controls page of the GUI? Note that the pin polarity for CDCE6214Q1TM is flipped (active-low) compared to the CDCE6214Q1.

    Thanks,

    Kadeem

  • 0 in reply to Kadeem Samuel
    Prodigy 10 points

    Hi Kadeem
    As you said，i pull low the GPIO1  and GPIO4. then out1 and out4 have waveform，but it is not the expected frequency. As shown in Figure 1.



    It seems that the chip can be configured via I2C now，But I don't know whether the register is correct or not. 

    it seems that register doesn't  correct generated by TICS PRO. As shown in Figure 2.

    So, how can I obtain the correct register map?  looking forward to your reply,tks!

  • 0 in reply to Felix fugang
    TI__Mastermind 23330 points

    Felix,

    Can you go to File > Save and send us the resulting configuration file? This way we can check your configuration on our side as well.

    Thanks,
    Kadeem