Image processing apparatus, image forming apparatus, and information processing apparatus with improved recovery from a power saving mode

An image forming apparatus comprising:

• an image former configured to form an image;
• a first controller including:
• first control circuitry configured to control the image former to form the image;
• and
• first power supply control circuitry configured to control power supply to the first control circuitry;
• and
• a second controller including:
• second control circuitry configured to control an external interface to receive an operation from outside of the image forming apparatus;
• and
• second power supply control circuitry configured to control power supply to the second control circuitry and configured to receive an operation from outside of the image forming apparatus during a power saving mode,
• wherein the first power supply control circuitry and the first control circuitry are connected through a first general-purpose input-and-output port,
• the second power supply control circuitry and the second control circuitry are connected through a second general-purpose input-and-output port, and
• the first power supply control circuitry and the second power supply control circuitry are connected through a third general-purpose input-and-output port,
• wherein in a case in which power supply to the first control circuitry and the second control circuitry except for the first general-purpose input-and-output port, the second general-purpose input-and-output port, and the third general-purpose input-and-output port is stopped in the power saving mode,
• when the second power supply control circuitry detects a factor of recovery from the power saving mode, the second power supply control circuitry powers on the second control circuitry though the second general-purpose input-and-output port and notifies the first power supply control circuitry of a recovery from the power saving mode though the third general-purpose input-and-output port, and
• when the first power supply control circuitry receives a notification of the recovery from the power saving mode from the second power supply control circuitry, the first power supply control circuitry powers on the first control circuitry though the first general-purpose input-and-output port.

An information processing apparatus comprising:

• a first controller including:
• first control circuitry configured to control a data processor to execute data processing;
• and
• first power supply control circuitry configured to control power supply to the first control circuitry;
• and
• a second controller including:
• second control circuitry configured to control an external interface to receive an operation from outside of the information processing apparatus;
• and
• second power supply control circuitry configured to control power supply to the second control circuitry and configured to receive an operation from outside of the information processing apparatus during a power saving mode,
• wherein the first power supply control circuitry and the first control circuitry are connected through a first general-purpose input-and-output port,
• the second power supply control circuitry and the second control circuitry are connected through a second general-purpose input-and-output port, and
• the first power supply control circuitry and the second power supply control circuitry are connected through a third general-purpose input-and-output port;
• wherein in a case in which power supply to the first control circuitry and the second control circuitry except for the first general-purpose input-and-output port, the second general-purpose input-and-output port, and the third general-purpose input-and-output port is stopped in the power saving mode,
• when the second power supply control circuitry detects a factor of recovery from the power saving mode, the second power supply control circuitry powers on the second control circuitry though the second general-purpose input-and-output port and notifies the first power supply control circuitry of a recovery from the power saving mode though the third general-purpose input-and-output port, and
• when the first power supply control circuitry receives a notification of the recovery from the power saving mode from the second power supply control circuitry, the first power supply control circuitry powers on the first control circuitry though the first general-purpose input-and-output port.