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CDCI6214: LVCMOS Output (Y2, Y3)

Part Number: CDCI6214

Hello,

I have a question about CDCI6214.

[Q]

Which LVCMOS Output (Y2. Y3) depends on VREF or VDDO12/34?

Best Regards,

Kaede Kudo 

  • Kudo,

    I have assigned this to an applications engineer who should get back to you shortly.

    Regards,
    Dean
  • Y2 depends on VDDO12 and Y3 depends on VDDO34, as noted in the pin description table (datasheet page 4).

    Alan

  • In reply to Alan O:

    Dean-san, Alan-san,

    Thank you for your comment.

    I understood it.

    Best Regards, 

    Kaede Kudo

  • In reply to KAEDE KUDO:

    Hello,

    I have one more question.

    Is the LVCMOS output Y0 dependent on VREF?

    (D/S p.9 6.15 LVCMOS Output Characteristics)

     I am worried about the following description D/S p.29 8.3.8.1 of Power Management.

    'The bypass output Y0 is connected to the pdn_ch4 bit.'

    Best Regards, 

    Kaede Kudo

  • In reply to KAEDE KUDO:

    Y0 is powered by VDDO34. To use Y0, pdn_ch4 must be set to 0.

    Kind regards,
    Lane

  • In reply to Lane Boyd:

    Lane-san,

    Thanks for your answer.

    Does that mean that the following configuration is impossible to realize?

    Y0:LVCMOS/3.0V
    Y1:LVDS/1.8V
    Y2:LVDS/1.8V
    Y3:LVDS/1.8V
    Y4:LVDS/1.8V

    Best Regards, 

    Kaede Kudo

  • In reply to KAEDE KUDO:

    Hi Kudo,

    This configuration is possible. Set chX_1p8vdet = 1 to set the output LVDS buffer common mode voltage to 0.9V .

    Kind regards,
    Lane
  • In reply to Lane Boyd:

    Lane-san, 

    Thank you for your reply.

    I understood your answer.

    Best Regards,

    Kaede Kudo

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