FlexRay communication controller for connecting FlexRay communication lines to a FlexRay network member assigned to the FlexRay communication controller, whereby said FlexRay communication controller encloses some parts as there are at least a message handler, a message memory, a first buffer memory structure for connecting said message memory to said FlexRay network member and a second buffer memory structure for connecting said message memory to said FlexRay communication lines, whereby all the parts are functioning together to connect said FlexRay communication lines to said FlexRay network member and said FlexRay communication controller is constructed in such a way that said functioning is controlled by the contents of a variety of registers located onto said FlexRay communication controller.