Patent ID: 11907008
Assignee: CANON KABUSHIKI KAISHA
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A communication apparatus comprising:
a communication circuit which operates to communicate with an external apparatus;
a clock supply circuit;
a CPU; and
a memory storing a program which, when executed by the CPU, causes the communication apparatus to function as:
a control unit configured to cause the communication circuit to operate in any one of a plurality of modes including a first mode and a second mode, the first mode being a mode in which the communication circuit performs a normal communication with the external apparatus, the second mode being a mode in which the communication circuit operates with lower power consumption than in the first mode,
wherein, in a case where the communication circuit operates in the second mode, the control unit controls the clock supply circuit so as not to supply a clock signal to the communication circuit, and
wherein, while the communication circuit is operating in the second mode and the clock signal is not being supplied to the communication circuit, the control unit controls the clock supply circuit to start supply of the clock signal to the communication circuit in response to receiving a predetermined signal; and
a measurement unit configured to output the predetermined signal to the control unit in response to lapse of a return period having been set.