A print management unit attaches an identifier to print data that goes through a custom processing unit functioning by execution of a custom class driver, and delivers the print data with the identifier attached, to a standard print control unit. The custom processing unit deletes the identifier from the print data delivered from the standard print control unit and customizes processing of causing a printer to execute printing, based on the print data. The print management unit detects a read state of the custom class driver by execution of an OS. When the read state indicates a failure in reading the custom class driver, the print management unit delivers the print data without the identifier attached, to the standard print control unit, and thus causes the printer to execute the printing that is limited via a standard communication control unit or to stop the printing.

An information processing apparatus includes a first integrated circuit including a first controller that processes data acquired from a device and that controls an operation of the device; a second integrated circuit including a second controller with a higher processing speed than a processing speed of the first controller; and a third integrated circuit including a first connection unit connectable to the device. The third integrated circuit includes a second connection unit connectable to the first integrated circuit, a third connection unit connectable to the second integrated circuit, and a setting unit that, when the device is connected to the first connection unit, sets an integrated circuit to be connected, in accordance with a communication speed of the connected device.

A communication I/F of an image generating unit writes settings for an image data to a transitory storage unit by serial communication before the image data is transmitted from the image generating unit to the transitory storage unit. The communication I/F stores partial information of an address used for previous writing in a cache unit, and omits the writing of the partial information of the address used for further writing if the partial information of the address matches the partial information of the stored address.

A print management unit attaches an identifier to print data that goes through a custom processing unit functioning by execution of a custom class driver, and delivers the print data with the identifier attached, to a standard print control unit. The custom processing unit deletes the identifier from the print data delivered from the standard print control unit and customizes processing of causing a printer to execute printing, based on the print data. The print management unit detects a read state of the custom class driver by execution of an OS. When the read state indicates a failure in reading the custom class driver, the print management unit delivers the print data without the identifier attached, to the standard print control unit, and thus causes the printer to execute the printing that is limited via a standard communication control unit or to stop the printing.

An information processing system includes a device including a circuit for configuring a logic circuit according to circuit information, a first control unit configured to process a first job by using a first logic circuit configured in the circuit according to first circuit information, the first control unit being connected to the device, and a second control unit configured to process a second job by using a second logic circuit configured in the circuit according to second circuit information, the second control unit being connected to the device, wherein the device can configure a logic circuit in the circuit according to circuit information transmitted from the first control unit, and wherein the first control unit transmits the first circuit information to the device to configure the first logic circuit in the circuit, and transmits the second circuit information to the device to configure the second logic circuit in the circuit.

An image forming apparatus, which includes a first storage, a second storage, and a bus, includes a first controller configured to store first image data based on input image data, in the first storage, when the input image data is input via the bus; a second controller configured to store second image data based on the first image data, in the second storage; a third controller configured to store third image data based on the second image data, in the first storage; a fourth controller configured to output output image data based on the third image data; and an image former configured to perform image formation based on the output image data.

Provided is an image processing apparatus to form an image on a sheet of paper, including a main body and a submodule detachably disposed on the main body. The main body includes an asynchronous serial bus and a master control unit. The submodule includes a slave control unit. An interactive asynchronous serial communication is performed between the master control unit and slave control unit. The master control unit includes a detection timing changing unit. The detection timing changing unit changes a scheduled timing to detect a second signal. The slave control unit includes a transmission signal changing unit. The transmission signal changing unit changes a state of the second signal from a first state detectable by the master control unit at a first timing to a second state detectable by the master control unit at a second timing.

Provided is an information processing apparatus that transmits image data input by sequentially reading originals, with limiting an allowable frame size. The apparatus includes: a transmission control unit, in which, in a case where an original has an existing size, the transmission control unit transmits the image data to a destination with frames having one of frame sizes selected based on the existing size of the original, such that transmission of the current image data is finished before a start of transmission of the image data of the next original.

A multifunction apparatus that is capable of executing a scan job and another image process in parallel without lowering a reading speed of a scanner unit. A reading unit reads a document according to an execution instruction for a predetermined image process. An image processing unit applies the predetermined image process to image data obtained by the reading unit. A clock controller controls an image transfer clock for transferring the image data to the image processing unit from the reading unit. The clock controller sets a frequency of the image transfer clock to a predetermined frequency in a case where the predetermined image process is executed independently. And the clock controller sets the frequency of the image transfer clock to a frequency lower than the predetermined frequency in a case where the predetermined image process is executed in parallel with another image process that differs from the predetermined image process.

A communication I/F of an image generating unit writes settings for an image data to a transitory storage unit by serial communication before the image data is transmitted from the image generating unit to the transitory storage unit. The communication I/F stores partial information of an address used for previous writing in a cache unit, and omits the writing of the partial information of the address used for further writing if the partial information of the address matches the partial information of the stored address.