Image processing device

An image processing device comprising:

• a first CPU;
• a second CPU;
• a reading engine;
• and
• a user interface,
• wherein the first CPU is configured to control the user interface,
• the second CPU is configured to control the reading engine,
• in a case where the image processing device is powered on:
• the first CPU executes first activation processing that is activation processing of the first CPU;
• the second CPU executes second activation processing that is activation processing of the second CPU including initial control of the reading engine;
• in a case where the second activation processing is completed, the second CPU is configured to cause the reading engine to perform reading in accordance with an instruction from the first CPU;
• in a case where the first activation processing is completed, the first CPU confirms whether the second activation processing executed by the second CPU is completed, and the first CPU is configured:
• not to allow at least an operation related to reading among operations on the user interface to be received until completion of the second activation processing is confirmed;
• and
• to allow the operation related to reading to be received, in a case where the completion of the second activation processing is confirmed;
• and
• in a case where the first CPU sends a reading instruction to the second CPU in accordance with the operation related to reading after the operation related to reading on the user interface is allowed to be received, the second CPU causes the reading engine to perform reading in accordance with the reading instruction from the first CPU.