"14) SMBus Connector (5-1 pin SMB)
This connector supports SMBus (System Management Bus) devices. SMBus devices communicate by means of the SMBus with an SMBus host and/or other SMBus devices. SMBus is a multi-device bus that permits multiple chips to connect to the same bus and enable each one to act as a master by initiating data transfer." (manual da A7V333)
Hugs.
P.S. - Vê-se mesma que estás a tirar dúvidas de boards de outro pessoal!