Spread Spectrum Clocking on BBB?

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1

Hello,

I would like to implement spread spectrum clocking for the BBB. Does the processor on the board support this? If so, how do I enable it? Thank you.

Best regards,
Paul

2

The processor should support it.

To implement it, redesign the board.

Gerald

3

Hi.

What kind of board changes would be required to enable spread spectrum clocking? The TI AM335x reference manual doesn’t mention any physical requirements for the feature to be used.

Chris

4

You need to have a spread spectrum clock generator mounted in place of the crystal on the board. You might try searching the forum. This was discussed a few years ago on an earlier BeagleBoard.

Gerald

5

Oh ok.

Thank you for the info. Wasn’t even aware that such a part existed.

Chris

6

http://www.digikey.com/product-search/en/integrated-circuits-ics/clock-timing-application-specific/2556714?k=spread%20spectrum

Gerald

7

You do not need to buy anything. It is right in the TI’s DM37xx. Please refer to section 13.4.11.3.2 SSC in the AM/DM37x Multimedia Device TRM.

2013/6/25 <witch359@gmail.com>

8

Too bad that the board does not use the DM37x processor.

Gerald