Data processing apparatus and control method for shifting between standby, suspended, and power-off states

摘要

When a data processing apparatus according to this invention detects generation of an event to shift from the standby state to the suspended state, it saves the contents of a memory in the standby state in a non-volatile storage device in response to detection of generation of the event, and shifts to the suspended state. When power-off is instructed in the suspended state, the data processing apparatus shifts from the suspended state to the power-off state without the mediacy of the standby state.

主权项

1. An image forming apparatus including (a) a standby state in which a job is executable, and (b) a suspended state in which power consumption is smaller than power consumption in the standby state, the image forming apparatus comprising:
a first control unit configured to control the image forming apparatus; a second control unit configured to control, according to a control by the first control unit, at least one of a scanner and a printer; and a receiving unit configured to receive a job to be processed by the scanner or the printer, the receiving unit being connected to a controller that includes the first control unit and the second control unit, wherein the receiving unit is configured to be able to receive the job while the image forming apparatus is in the suspended state, wherein the second control unit is configured to:
(a) shift, if a predetermined event occurs, a state of the image forming apparatus from the standby state to the suspended state by turning off the first control unit and storing a process information of the image forming apparatus in a storage unit;(b) shift, if the reception unit receives the job while the image forming apparatus is in the suspended state, the state of the image forming apparatus from the suspended state to the standby state; and(C) shift, if turning off the image forming apparatus is instructed, the state of the image forming apparatus from the suspended state to a turned-off state, and wherein the first control unit is configured to restore the process information to the image forming apparatus if turning on the image forming apparatus is instructed while the image forming apparatus is in the turned-off state.