C6678 Initial Smart Reflex VID Value

Richard Marsh

Hi,

I wanted to clarify what the initial VID value for the C6678 should be. I believe the thinking on this has changed as I see some posts with 0.949 and some with a higher value. The hardware design guide and datasheet are rather ambiguous on this point.

Please can you specify the initial CVDD in VID Code and Voltage, for use in the "Vid Code Init" setting in Fusion. I am using a 1.25GHz chip.

Cheers,

Richard

over 12 years ago

0 Chad Courtney over 12 years ago

TI__Mastermind 30825 points

Richard,

1.1V should be the initial value used, this is required while the device initially powers up and gives the SR VID via the VCNTL pins. We realize the HW Design Guidelines doesn't make this clear, and we are working to update the HW Design Guidelines with this.

Best Regards,

Chad

0 Richard Marsh over 12 years ago in reply to Chad Courtney

Intellectual 760 points

Hi Chad,

Thanks for the prompt reply.

Do you mean VID value 62 dec (1.096V) or VID value 63dec (1.103V)?

Cheers,

Richard

0 Chad Courtney over 12 years ago in reply to Richard Marsh

TI__Mastermind 30825 points

63DEC - 1.103V.

Best Regards,
Chad

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C6678 Initial Smart Reflex VID Value