Multifunction peripheral capable of executing double-sided reading process, method of controlling same, and storage medium

A method of controlling an image processing apparatus that includes a scanner controller, a controller, and a scanner configured to scan a first side and a second side of a document sheet, the scanner controller including a memory that stores the generated image data and being configured to transfer the image data to the controller, the controller including an image processor configured to perform a predetermined image process on the image data transferred from the scanner controller, the method comprising:

• determining whether another predetermined image process that differs from the predetermined image process is being performed;
• setting, for transferring image data of the first side of the document sheet, in a case where it is determined that another predetermined image process is not being performed, a frequency of an image transfer clock to a first frequency, and setting, in a case where it is determined that another predetermined image process is being performed, the frequency of the image transfer clock to a second frequency lower than the first frequency;
• and
• setting, for transferring image data of the second side of the document sheet, in a case where it is determined that another predetermined image process is not being performed, the frequency of the image transfer clock to the first frequency, and setting, in a case where it is determined that another predetermined image process is being performed, the frequency of the image transfer clock to the second frequency.

A non-transitory computer-readable storage medium storing a computer-executable program for executing a method of controlling an image processing apparatus that includes a scanner controller, a controller, and a scanner configured to scan a first side and a second side of a document sheet, the scanner controller including a memory that stores the generated image data and being configured to transfer the image data to the controller, the controller including an image unit processor configured to perform a predetermined image process on the image data transferred from the scanner controller, wherein the method comprises:

• determining whether another predetermined image process that differs from the predetermined image process is being performed;
• setting, for transferring image data of the first side of the document sheet, in a case where it is determined that another predetermined image process is not being performed, a frequency of an image transfer clock to a first frequency, and setting, in a case where it is determined that another predetermined image process is being performed, the frequency of the image transfer clock to a second frequency lower than the first frequency;
• and
• setting, for transferring image data of the second side of the document sheet, in a case where it is determined that another predetermined image process is not being performed, the frequency of the image transfer clock to the first frequency, and setting, in a case where it is determined that another predetermined image process is being performed, the frequency of the image transfer clock to the second frequency.