Patent ID: 8516174

Claim:
A method for transmitting data frames between a master device and at least one slave device via a bus system, the method comprising: transmitting, using at least one request line of the bus system, request data frames from the master device to the at least one slave device; transmitting, using a response line of the bus system, response data frames from the at least one slave device to the master device, wherein the request data frames and the response data frames are transmitted synchronously with one another during selection cycles; and activating, using at least one selection line of the bus system, the at least one slave device; wherein the request data frames and the response data frames are transmitted together with at least one address bit for addressing the at least one slave device, useful data bits and at least one length-indicating bit for indicating the data frame length; wherein, for a selected request data frame transmitted in a given selection cycle, an appertaining response data frame is transmitted in a selection cycle directly following the selection cycle of the selected request data frame; wherein, depending on useful data bits of the selected request data frame, the appertaining response data frame is an extended response data frame; and wherein, depending on useful data bits of the selected request data frame, an extended request data frame extended by additional bits is transmitted during the selection cycle of the appertaining response data frame.