Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify a multi-mode capability for communications by the UE within a frequency band, such that that UE may be capable of operating in any one of a half duplex time division duplex (TDD) mode and a full duplex frequency division duplex (FDD) mode within the frequency band. The UE may then transmit an indication of the multi-mode capability to a base station. The UE may receive, from the base station and responsive to the transmission of the indication, a communication format configuration that includes a partitioning between TDD mode communications and FDD mode communications for the frequency band.