Printing device and method of controlling printing device

A method of controlling a printing device, comprising:

• by a printing unit, printing image data of a plurality of colors generated by an upper level device on a printing medium;
• by a plurality of data storage units, respectively receiving the image data of the plurality of colors from the upper level device through a plurality of first transfer paths corresponding respectively to the image data of the plurality of colors and store the image data;
• by a control unit, controlling the plurality of data storage units such that the plurality of data storage units receive control information to control printing of the image data of the plurality of colors from the upper level device through a second transfer path, and request the upper level device to transfer the image data of the plurality of colors on the basis of the control information, and controlling the plurality of data storage units such that the plurality of data storage units receive the image data of the plurality of colors transferred from the upper level device and store the image data;
• and
• by a conveyance control unit, controlling a conveyance unit conveying the printing medium, wherein
• in the controlling the conveyance unit, notifying the control unit of a printable state, when the conveyance unit satisfies predetermined conditions, and
• in the controlling the plurality of data storage units, controlling the plurality of data storage units such that the plurality of data storage units transfer the stored image data of the plurality of colors respectively to the printing unit, when the notification of the printable state is received.