摘要:
A method and apparatus for processing data, with the data processing side performing main control and the print control side including control for saving power. The print control side performs transition of a plurality of power saving states to obtain an optimal power saving state on the basis of transfer of data from the main control side, and the data processing side performs various control operations independently of the transition of the plurality of power saving states.
摘要:
In a data transfer method, virtual handshake busy data is transferred to an I/O register when data is transferred through a parallel interface between data processing and printer units connected to the I/O register through a bus and a transfer storage area in the printer unit has an empty area having a predetermined amount or more.
摘要:
A printing method and apparatus according to the present invention is capable of instructing whether or not a printing portion is used in a case where data is received from a host so as to be printed, and the initializing control required to perform printing can be skipped at the time of power supply if the printing portion is not used, or arranged to store a fact whether or not initialization has been performed so that whether or not the initialization is performed is controlled at the time of the power supply or when a printing opportunity has been issued.
摘要:
An information processing apparatus comprises: a memory to store emulation information which is designated from a host computer that is connected to a printer via a general parallel interface; a judging circuit to judge a delimiter of print data; and a control unit to switch the emulation on the basis of the emulation information stored in the memory and the result of the judgment by the judging circuit. When each section of the apparatus is in the inoperative state, they are set into the power saving mode and are sequentially controlled. Thus, the power saving of the whole apparatus can be realized.
摘要:
In a printer control method, image-data processing which has previously been performed in a printer (printer unit) is performed by a host computer (host unit), so that the cost of the printer is reduced. More specifically, the printer unit includes a holding unit for holding control commands from the host unit, and an execution unit for executing the control commands. The host unit includes an analysis unit for analyzing printer commands, control-command forming unit for forming control commands from the printer commands, and a transmission unit for transmitting the control commands to the printer unit. The printer unit is controlled by converting printer commands into control commands in accordance with printing instructions provided from host-unit application software and transmitting the obtained control commands to the printer unit.
摘要:
A data transmission system where an image providing device and a printer are directly connected by a 1394 serial bus, a command is sent from the image providing device to the printer, then a response to the command is returned from the printer to the image providing device. Image data is sent from the image providing device to the printer based on information included in the response. The printer converts the image data outputted from the image providing device into print data. Thus, printing can be performed without a host computer by directly connecting the image providing device and the printer by the 1394 serial bus or the like.
摘要:
In a system where a digital still camera 1101 is connected to a printer 1102 on a 1394 serial bus, when the digital still camera 1101 as a data transfer originator node transfers image data to the printer 1102 as a data transfer destination node, the printer 1102 sends information on the data processing capability of the printer 1102 to the digital still camera 1101 prior to data transfer. The digital still camera 1101 determines the block size of image data to be transferred in accordance with the data processing capability of the printer 1102, and sends image data of the block size to the printer 1102. The information indicates the capacity of a memory of the printer for storing print data, or the printing capability of a printer engine, i.e., printing resolution, printing speed and the like. Thus, data transfer is always efficiently performed regardless of the data processing capability of the printer 1102.
摘要:
A data transmission system where an image providing device and a printer are directly connected by a 1394 serial bus, a command is sent from the image providing device to the printer, then a response to the command is returned from the printer to the image providing device. Image data is sent from the image providing device to the printer based on information included in the response. The printer converts the image data outputted from the image providing device into print data. Thus, printing can be performed without a host computer by directly connecting the image providing device and the printer by the 1394 serial bus or the like.
摘要:
In response to a request from a host device using an initial protocol, capability information including information indicative of a plurality of communication protocols is returned to the host device, and a communication protocol, designated by the host device based on the capability information, is set, and print data is received from the host device by the set communication protocol. In a system using an interface connected to various types of devices, e.g., an IEEE 1394 serial bus, a communication protocol, which is used when a host device transfers print data to a printer, is not limited to that unique to the manufacturer of the device.
摘要:
In response to a request from a host device using an initial protocol, capability information including information indicative of a plurality of communication protocols is returned to the host device, and a communication protocol, designated by the host device based on the capability information, is set, and print data is received from the host device by the set communication protocol. In a system using an interface connected to various types of devices, e.g., an IEEE 1394 serial bus, a communication protocol, which is used when a host device transfers print data to a printer, is not limited to that unique to the manufacturer of the device.