INTERFACE CIRCUIT, INVERTER APPARATUS, INVERTER SYSTEM AND TRANSMISSION/RECEPTION METHOD

摘要

An object is to provide an interface circuit, an inverter device, an inverter system, and a transmitting and receiving method that are low-cost and can be developed in a shorter period of time. An interface circuit 7 includes a general-purpose CPU 8 configured to transmit a clock to a serial encoder 2 with which bidirectional serial communication of clock synchronization type is to be performed, the CPU 8 being configured to transmit and receive data to and from the serial encoder 2; and an additional circuit 20 configured to detect a start bit of reception data transmitted from the serial encoder 2. The general-purpose CPU 8 starts counting the number of bits of the reception data in response to a detection signal from the additional circuit 20, the detection signal indicating the detection of the start bit. The CPU 8 stops transmitting the clock to the serial encoder 2 upon completion of counting a predetermined number of bits of the reception data.