CDCI6214: LVCMOS input clock

Hiroaki Yuyama TED

Part Number: CDCI6214

Dear, Support Team.

Our customer uses the input clock of CDCI6214 with LVCMOS.
When the input clock is LVCMOS, are the FB_N and REFP/N input pins open?

Best Regards,
Hiroaki Yuyama

over 3 years ago

0 Connor Lewis over 3 years ago

TI__Genius 15320 points

Hi Hiroaki,

When using an LVCMOS crystal input on the CDCI6214, only the XOUT/FB_P pin is used and the FB_N and REFP\N pins can be left floating. I've attached a recommended schematic for reference. If you are using a non-crystal LVCMOS source, then REFP can be used instead. Also, note that bit 15 of the INPUT0 register will need to be set to 0 to enable LVCMOS inputs.

Regards,

Connor

0 Hiroaki Yuyama TED over 3 years ago in reply to Connor Lewis

Expert 1810 points

Hi, Connor-san,
Thank you for your kind reply.

I was able to understand the LVCMOS input pin states and register settings.

Best Regards,
Hiroaki Yuyama

Clock & timing

Clock & timing forum

CDCI6214: LVCMOS input clock