Abstract: An electronic apparatus includes a first communication section that performs first communication in a wireless manner based on a first communication standard, a second communication section that performs second communication in a wired manner based on a second communication standard different from the first communication standard, and a controller that controls the first communication section and the second communication section. When a connection through the second communication is performed during a connection through the first communication, the first communication is not disconnected until a predetermined packet is received through the second communication and is disconnected when the predetermined packet is received through the second communication.

Abstract: When a control circuit of a printer detects a USB connection with a host device when a power switch is in an on state in an initial state, the control circuit performs an initialization process (enumeration) (a first initialization process) which requests bus power, and performs a USB communication process and charging of a secondary cell after the first initialization process is completed (successful). When the first initialization process fails, the control circuit performs an initialization process requesting self power (a second initialization process), and does not perform charging of the secondary cell. Here, the first initialization process includes a request for a greater supply of power than the second initialization process.

Abstract: A communication device configured to performing communication with an external device. The communication device includes a calculation unit, a recording unit configured to record a first firmware that makes the calculation unit function in a first mode, and a second firmware that makes the calculation unit function in a second mode that is different from the first mode, and a communication unit, when the calculation unit receives a signal from the external device in a designated state switching from execution of the first firmware to execution of the second firmware, configured to make a response not according to contents of the received signal.

Abstract: When a control circuit of a printer detects a USB connection with a host device when a power switch is in an on state in an initial state, the control circuit performs an initialization process (enumeration) (a first initialization process) which requests bus power, and performs a USB communication process and charging of a secondary cell after the first initialization process is completed (successful). When the first initialization process fails, the control circuit performs an initialization process requesting self power (a second initialization process), and does not perform charging of the secondary cell. Here, the first initialization process includes a request for a greater supply of power than the second initialization process.

Abstract: A communication device configured to performing communication with an external device. The communication device includes a calculation unit, a recording unit configured to record a first firmware that makes the calculation unit function in a first mode, and a second firmware that makes the calculation unit function in a second mode that is different from the first mode, and a communication unit, when the calculation unit receives a signal from the external device in a designated state switching from execution of the first firmware to execution of the second firmware, configured to make a response not according to contents of the received signal.