C6678 interfacing HCSL/CORECLKP/N

g.f.

Hi,

I have a question about Coreclk(P/N) of C6678.

C6678 Coreclk(P/N) I/O type is LVDS.
So, is it possible to interface HCSL output type to the Coreclk(P/N) of C6678?

If it's possible what kind of circuit configuration should it be ?

LJCB have internal termination and common mode biasing, so I think that
only configurating AC coupling between HSCL driver and LJCB(CORECLKP/N) is needed.
No other configuration is needed.
Am I wrong?

Please give me an advise.

Best regards,
g.f.

over 13 years ago

0 Bill Taboada over 13 years ago

TI__Mastermind 42545 points

You are correct. The LJCB can interface with HSCL drivers with just the AC coupling. This is the same connection needed by the LVDS.

0 g.f. over 13 years ago in reply to Bill Taboada

Guru 15520 points

Bill,

Thank you for quick response.
Now, I understood the configuration.

Best Regards,
g.f.

0 g.f. over 13 years ago in reply to Bill Taboada

Guru 15520 points

Bill,

Soryy, I have a few more questions about AC coupling.
Is it okay to refer to AC coupling portion of C6678 EVM ?

And what value should I choose for AC coupling ?
In Hardware Design Guide(sprab2b) page.20 Table 5,
the value for CORECLKP/N is 0.1uF. So, is this the value which I should choose?

Best regards,
g.f.

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C6678 interfacing HCSL/CORECLKP/N