CDCI6214: LVCMOS Output (Y2, Y3)

KAEDE KUDO

Expert 2700 points

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

over 5 years ago

0 Dean Banerjee over 5 years ago

TI__Mastermind 27581 points

Kudo,

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

Regards,
Dean

0 Alan O over 5 years ago

TI__Mastermind 32575 points

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

Alan

0 KAEDE KUDO over 5 years ago in reply to Alan O

Expert 2700 points

Dean-san, Alan-san,

Thank you for your comment.

I understood it.

Best Regards,

Kaede Kudo

0 KAEDE KUDO over 5 years ago in reply to KAEDE KUDO

Expert 2700 points

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

0 Lane Boyd over 5 years ago in reply to KAEDE KUDO

TI__Genius 16845 points

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

Kind regards,
Lane

0 KAEDE KUDO over 5 years ago in reply to Lane Boyd

Expert 2700 points

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

0 Lane Boyd over 5 years ago in reply to KAEDE KUDO

TI__Genius 16845 points

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

0 KAEDE KUDO over 5 years ago in reply to Lane Boyd

Expert 2700 points

Lane-san,

Thank you for your reply.

I understood your answer.

Best Regards,

Kaede Kudo

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CDCI6214: LVCMOS Output (Y2, Y3)