Various embodiments increase the speed of communication over a multi-mode bus by communicating data over multiple pins in the same direction. The bus includes multiple data communication pins communicating over the bus. The bus includes a chip select pin indicating whether communication is occurring between the integrated circuit and another integrated circuit. The bus includes a clock pin. The bus includes a mode control circuit. In one mode, two of the data communication pins communicate in opposite directions between the integrated circuit and another integrated circuit. In another mode, two of the data communication pins communicate in a same direction between the integrated circuit and another integrated circuit. In some embodiments, the bus follows a Serial Peripheral Interface standard. In various embodiments, data is communicated from the integrated circuit to another integrated circuit, or from another integrated circuit to the integrated circuit.