Does DC-DC on Colibri iMX6ULL assembled from the beginning?

Does DC-DC converter on Colibri iMX6ULL assembled from the beginning ?

Do I need to attach it if it is not assembled?

Could you please clarify - what kind of DC-DC converter you are talking about?

Sorry, I made a mistake.

Does DC-DC converter on Viola Plus V1.2 assembled from the beginning ?

Do I need to attach it if it is not assembled?

Yes, 5V->3.3V DC-DC converter assembled on both Viola Plus V1.2 and Viola V1.2 boards. Please check Viola’s block diagram for details.