A radio transmitting/receiving circuit, a wireless communication apparatus and a radio transmitting/receiving method, wherein low power consumption can be achieved without complicating software. In a control unit of the radio transmitting/receiving circuit, according to a communication system applied to a radio transmitting/receiving unit, a clock control unit selects a clock frequency; a program decoder adjusts information included in a transmission/reception program and related to the execution timing of the transmission/reception program for the radio transmitting/receiving unit; and a timing control unit controls the execution timing on the basis of the adjusted information related to the execution timing. The information related to the execution timing includes a bit sequence indicating an ON/OFF timing for the radio transmitting/receiving unit in accordance with a first communication system, and the program decoder bit-shifts the bit sequence if a second communication system is applied to the radio transmitting/receiving unit.