Abstract: An image reading device includes an arbitration unit; a first transmission/reception unit that receives read image data and transfers the image data to the arbitration unit; a second transmission/reception unit that receives the image data from the arbitration unit and transfers the image data to a first storage unit; a detection unit that detects that a used amount of a buffer of the second transmission/reception unit exceeds a threshold; and an instruction unit that instructs changing a destination of image data, which are to be transferred from the first transmission/reception unit, to a second storage unit which is connected to the arbitration unit in response to a detection by the detection unit that the used amount of the buffer exceeds the threshold.

Abstract: An image reading device includes an arbitrating unit configured to obtain read data on a main-scan-line-by-main-scan-line basis from a first image sensor that reads one side of a document and read data on a main-scan-line-by-main-scan-line basis from a second image sensor that reads the other side of the document. The arbitrating unit transfers a piece of read data obtained from the first image sensor and the second image sensor alternately. The device also includes a reducing unit configured to perform reduction in image data including the read data in a sub-scanning direction in a way that thins on the transferred pieces of read data corresponding respectively to main scan lines; an image processing unit configured to perform image processing on the read data having undergone the thinning; and a transfer unit configured to transfer the read data having undergone the image processing to another unit.

Abstract: An image reading device includes an arbitrating unit configured to obtain read data on a main-scan-line-by-main-scan-line basis from a first image sensor that reads one side of a document and read data on a main-scan-line-by-main-scan-line basis from a second image sensor that reads the other side of the document. The arbitrating unit transfers a piece of read data obtained from the first image sensor and the second image sensor alternately. The device also includes a reducing unit configured to perform reduction in image data including the read data in a sub-scanning direction in a way that thins on the transferred pieces of read data corresponding respectively to main scan lines; an image processing unit configured to perform image processing on the read data having undergone the thinning; and a transfer unit configured to transfer the read data having undergone the image processing to another unit.

Abstract: A motor drive device drives a stepping motor having a rotor mounted on a rotating shaft with a capability of making a transition between a plurality of excitation modes. A motor control unit drives the stepping motor by controlling the rotor to move to a position corresponding to an excitation modes. A stop control unit controls, when stopping the stepping motor, a stop of the rotor at a position to which the rotor is moved by the motor control unit common to the excitation modes after the stop of the rotor is issued.

Abstract: A motor drive device drives a stepping motor having a rotor mounted on a rotating shaft with a capability of making a transition between a plurality of excitation modes. A motor control unit drives the stepping motor by controlling the rotor to move to a position corresponding to an excitation modes. A stop control unit controls, when stopping the stepping motor, a stop of the rotor at a position to which the rotor is moved by the motor control unit common to the excitation modes after the stop of the rotor is issued.