Signaling protocols for radio frequency front-end control interface (RFFE) buses are disclosed. In an exemplary aspect, the RFFE protocol is modified to provide addresses that are shorter than the normal four bits allocated by the RFFE protocol. By allocating fewer bits to an address, frames sent across an RFFE bus are shorter, and thus, bus turnaround time is improved, which reduces overall latency. Further, it is possible that shorter messages may provide incremental power savings. In a further exemplary aspect, different portions of a frame are transmitted using different data rates. In particular, a bus management portion may be sent using a single data rate (SDR), and a payload portion may be sent using a double data rate (DDR). The net effect of using the DDR on the payload portion is to reduce bus turnaround time, and thus, reduce latency.
