Abstract: A communication device includes: a first communication element configured to perform communication in a first communication scheme; a second communication element configured to perform communication in a second communication scheme different from the first communication scheme by using, as common hardware, at least part among hardware that implements the communication in the first communication scheme; a schedule management section that manages which of the first communication element and the second communication element is to be used; and a sequence control section that, in accordance with an instruction given from the schedule management section, sets the common hardware so as to enable the communication in the first communication scheme or the communication in the second communication scheme to be performed.

Abstract: A communication system includes information acquisition devices having facility information and an information collection device for collecting the facility information from the information acquisition devices. The information collection device requests the information acquisition devices to send the facility information by using the first communication unit and the second communication unit of the information collection device. Each of the information acquisition devices includes a communication scheme specifying section for specifying which one of the first communication unit and the second communication unit in each of the information acquisition devices has first received the request to send from the information collection device, and a communication control section for making a reply to the request to send by using the communication unit specified by the communication scheme specifying section.

Abstract: A communication device includes: a reception element for receiving a radio signal modulated in a first modulation scheme or a second modulation scheme; a first demodulation element for demodulating the received radio signal in a first demodulation scheme corresponding to the first modulation scheme; a second demodulation element for demodulating the received radio signal in a second demodulation scheme corresponding to the second modulation scheme; and a modulation scheme detection section for detecting a modulation scheme of the received radio signal. The received radio signal includes modulation scheme determination information. The modulation scheme detection section detects the modulation scheme of the received radio signal based on a result of demodulation of the modulation scheme determination information performed by the first demodulation element and a result of demodulation of the modulation scheme determination information performed by the second demodulation element.

Abstract: A communication system includes information acquisition devices having facility information and an information collection device for collecting the facility information from the information acquisition devices. The information collection device requests the information acquisition devices to send the facility information by using the first communication unit and the second communication unit of the information collection device. Each of the information acquisition devices includes a communication scheme specifying section for specifying which one of the first communication unit and the second communication unit in each of the information acquisition devices has first received the request to send from the information collection device, and a communication control section for making a reply to the request to send by using the communication unit specified by the communication scheme specifying section.

Abstract: A communication device includes: a first communication element configured to perform communication in a first communication scheme; a second communication element configured to perform communication in a second communication scheme different from the first communication scheme by using, as common hardware, at least part among hardware that implements the communication in the first communication scheme; a schedule management section that manages which of the first communication element and the second communication element is to be used; and a sequence control section that, in accordance with an instruction given from the schedule management section, sets the common hardware so as to enable the communication in the first communication scheme or the communication in the second communication scheme to be performed.

Abstract: A communication device includes: a reception element for receiving a radio signal modulated in a first modulation scheme or a second modulation scheme; a first demodulation element for demodulating the received radio signal in a first demodulation scheme corresponding to the first modulation scheme; a second demodulation element for demodulating the received radio signal in a second demodulation scheme corresponding to the second modulation scheme; and a modulation scheme detection section for detecting a modulation scheme of the received radio signal. The received radio signal includes modulation scheme determination information. The modulation scheme detection section detects the modulation scheme of the received radio signal based on a result of demodulation of the modulation scheme determination information performed by the first demodulation element and a result of demodulation of the modulation scheme determination information performed by the second demodulation element.

Abstract: When data is sent from an arbitrary host interface out of a plurality of host interfaces for connecting a plurality of host apparatuses, the acceptance of the data is started, and the acceptance of data from the other host interfaces are inhibited. When it is judged that the acceptance of data corresponding to all pages sent has been terminated, a state where the acceptance of the data from the other host interfaces (from which data are inhibited from being accepted) is being inhibited is released. Consequently, even when data are simultaneously sent from two or more host apparatuses to a printer, it is possible to normally print out the data.

Abstract: A memory designation control device having a rewriting program for rewriting the contents of a first memory device storing a basic program stored in a second memory device different from the first memory device. When the system power supply is turned on when a normal processing mode is selected, only the first memory device out of the first memory device and the second memory device is brought into a selectable state. Consequently, in the normal processing mode, normal processing is executed on the basis of the basic program. When the system power supply is turned on when a rewrite processing mode is selected, only the second memory device out of the first memory device and the second memory device is brought into a selectable state at the time of a read instruction, while only the first memory device out of the first memory device and the second memory device is brought into a selectable state at the time of a write instruction.

Abstract: A data communication device includes an identification code generator for generating code indicative of the kind of data. A transfer data generator generates transfer data in the form at least two kinds of data. The transfer data generator adds the identification code to the generated data. A controller controls the identification code generator and the transfer data generator to output the generated transfer data at a predetermined time.