Communication device, communication system, communication method, and communication circuit

A transmitter which transmits a predetermined amount of transfer data using an infrared ray includes: a controller for transmitting an SNRM command to the other station without transmitting a station-search command (XID) for searching the other station, the SNRM command including parameters such as maximum transferable speed and maximum receivable data length of the transmitter; and a transmission section. Consequently, it is possible to shorten a time necessary for a connection between the transmitter and the receiver. This allows shortening a time from the start of communication to the end of the communication in transmitting information data.