David Cassidy Pleads Not Guilty to DUI

11/30/2010 10:30 AM PST

David Cassidy Pleads Not Guilty to DUI

David Cassidy is adamant he was not drunk in dash cam video Florida officials released yesterday -- and this morning the former "Partridge Family" star officially plead not guilty to the DUI charge.

Cassidy -- who was charged with one count of DUI -- was not present in a Florida courtroom this morning when his attorney submitted the not guilty plea in writing.

If convicted, David could face up to 6 months in jail and a $1,000 maximum fine.

As we previously reported, David copped to taking a pain pill for his back earlier in the day -- and says he may have been tired from an early morning funeral he had to attend -- but dude claims he definitely wasn't drunk.

He's due back in court in January.