Image processing apparatus, image processing circuit, and method of controlling image processing apparatus

An image processing circuit for an image processing apparatus including a reading unit configured to read a document and an image forming and outputting unit configured to perform an image forming and outputting process, the image processing circuit being configured to connect the reading unit and the image forming and outputting unit to a controller of the image processing unit, the image processing circuit comprising:

• a read image transfer circuit configured to process read image information that has been read and generated by the reading unit and configured to transfer the read image information, so as to input the read image information to the controller;
• an output image transfer circuit configured to process output image information that has been transferred from the controller and configured to transfer the output image information, so as to input the output image information to the image forming and outputting unit, wherein the image forming and outputting unit is to apply the image forming and outputting process to the output image information;
• and
• a clock oscillator configured to generate first clocks to be supplied to the read image transfer circuit and second clocks to be supplied to the output image transfer circuit,
• wherein the clock oscillator is configured to individually alter a first clock supply state for supplying the first clocks to the read image transfer circuit and a second clock supply state for supplying the second clocks to the output image transfer circuit, depending on an operating mode of the image processing apparatus.

A method of controlling an image processing apparatus including a reading unit configured to read a document and an image forming and outputting unit configured to perform an image forming and outputting process,

• wherein the image processing apparatus includes
• a read image transfer circuit configured to process read image information that has been read and generated by the reading unit and configured to transfer the read image information, so as to input the read image information to a controller of the image processing apparatus;
• an output image transfer circuit configured to process output image information that has been transferred from the controller and configured to transfer the output image information, so as to input the output image information to the image forming and outputting unit, wherein the image forming and outputting unit is to apply the image forming and outputting process to the output image information;
• and
• a clock oscillator configured to generate first clocks to be supplied to the read image transfer circuit and second clocks to be supplied to the output image transfer circuit,
• wherein the method of controlling the image processing apparatus comprises:
• a step of detecting a change in an operating mode of the image processing apparatus;
• and
• a step of individually altering a first clock supply state for supplying the first clocks to the read image transfer circuit and a second clock supply state for supplying the second clocks to the output image transfer circuit, depending on the detected operating mode of the image processing apparatus.