Patent ID: 11928370
Assignee: KYOCERA DOCUMENT SOLUTIONS INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G  Y | IPC G

Claim 0:
1. An image forming apparatus comprising:
a USB interface including a VBUS terminal, a D+ terminal, a D− terminal, and an ID terminal;
a control portion configured to control a communication device connected to the USB interface; and
a voltage output portion capable of outputting a rated voltage to the communication device through the VBUS terminal, wherein
the control portion is operable in a normal mode or a power saving mode in which power consumption is smaller than in the normal mode,
the control portion includes:
a USB host portion to which power is supplied in the normal mode and to which power supply is stopped in the power saving mode; and
a signal input portion and a signal output portion to which power is supplied in both the normal mode and the power saving mode,

in the normal mode, the USB host portion is capable of acquiring, through the D+ terminal and the D− terminal, print request data received by the communication device while outputting a first control signal,
the signal input portion is capable of receiving a signal from the communication device through the ID terminal,
the control portion shifts to the normal mode when a notification signal is input to the signal input portion while operating in the power saving mode,
the signal output portion outputs a second control signal after the first control signal is output when the control portion is activated, and outputs the second control signal in both the normal mode and the power saving mode, and
the voltage output portion outputs the rated voltage when at least one of the first control signal and the second control signal is output.