A printing apparatus includes: a printing section including a plurality of printing elements that performs printing on a medium; a power supply circuit supplying power to the printing section; a control circuit controlling the printing section and the power supply circuit; and a USB-Type-C interface configured to couple an external device and including a data transmission/reception terminal, a power input/output terminal, and a state identification terminal. When the state identification terminal detects that the external device that receives the power via the power input/output terminal is coupled, and the printing section performs printing, an amount of power supplied to the external device is large in a case in which a drive rate of the plurality of printing elements is low as compared with a case in which the drive rate of the plurality of printing elements is high.

A point-of-sale (POS) device includes a processor, a battery, a transaction object reader, a printer with a printer controller, and optionally a temperature sensor. The processor determines a present power discharge capability rate of the battery, optionally based on a temperature measured by the temperature sensor. The processor also calculates a first estimated power draw rate based on a first setting value for at least one of the components of the POS device, such as the printer. If the first estimated power draw rate is dangerously close to the present power discharge capability rate of the battery, a second estimated power draw rate is calculated based on a second setting value for the one or more components. If the second estimated power draw rate is no longer dangerously close to the present power discharge capability rate of the battery, the components are set to the second settings value.

An information processing apparatus includes a control unit, a storage unit configured to store a program to be executed by the control unit, a verification unit configured to read the program from the storage unit and to verify the read program, and a light-emitting unit configured to be changed to a predetermined light-emitting state or to be changed from the predetermined light-emitting state based on a result of the verification of the program by the verification unit.

An information processing apparatus includes a processor configured to control an operation of an apparatus by executing a control program, in a case where an instruction to shift to a power-off state is received, perform shift from a normal operation state to any one of a first power-off state or a second power-off state, the first power-off state being a state where the operation is stopped without restarting the control program, the second power-off state being a state where the control program is restarted and then the operation is stopped, and in a case where the shift to the first power-off state is made, set at least a part of information regarding an operation of the information processing apparatus to a value that is set in a case where the control program is restarted.

A point-of-sale (POS) device includes a processor, a battery, a transaction object reader, a printer with a printer controller, and optionally a temperature sensor. The processor determines a present power discharge capability rate of the battery, optionally based on a temperature measured by the temperature sensor. The processor also calculates a first estimated power draw rate based on a first setting value for at least one of the components of the POS device, such as the printer. If the first estimated power draw rate is dangerously close to the present power discharge capability rate of the battery, a second estimated power draw rate is calculated based on a second setting value for the one or more components. If the second estimated power draw rate is no longer dangerously close to the present power discharge capability rate of the battery, the components are set to the second settings value.

An image forming apparatus to which an external apparatus is connected includes an image forming unit configured to form an image, and a power supply device configured to supply power to the image forming apparatus and the external apparatus. In a case where a value of an alternating current voltage input to the power supply device is a first value, the power supply device supplies first power to the external apparatus. In a case where the value of the alternating current voltage is a second value smaller than the first value, the power supply device supplies second power smaller than the first power to the external apparatus.

In a normal mode that is a mode when a user performs a printing work, a wireless operation unit shifts to a second mode when the wireless operation unit is not operated for a first predetermined time in a first mode. In a maintenance mode when a repairman performs a maintenance work, the wireless operation unit does not shift to the second mode even if the wireless operation unit is not operated for the first predetermined time in the first mode. In addition, in the maintenance mode, if the remaining amount of a battery is equal to or greater than a predetermined amount in the first mode, the wireless operation unit does not shift to the second mode, and if the remaining amount of the battery is less than the predetermined amount, the wireless operation unit shifts to the second mode.

An information processing apparatus that reduces power consumption using IEEE802.11ah connection without spoiling usability of wireless communication. The information processing apparatus includes a memory device that stores instructions, and a processor that executes the instructions to wirelessly communicate with an external apparatus by at least one of a first communication function that wireless communicates by a first wireless communication method that conforms to IEEE802.11ah and a second communication function that wirelessly communicates by a second wireless communication method of which a communication speed is higher than that of the first wireless communication method, determine whether an electric power state of the apparatus is a second electric power state in which power consumption is lower than a first electric power state, and prompt a user to set switching setting that stops the second communication function and starts the first communication function in the second electric power state.

A hardware circuit (403) outputs different output signals between a case where an operation of an operating switch (402) is continued for longer than a threshold time and the other cases. An operation detecting CPU (404) outputs different output signals between a case of having detected the operation of the operating switch (402) and the other case. A signal generating section (405) feeds a control signal for switching the power supply mode to an off mode into a power control section (401): when the hardware circuit (403) outputs an output signal different from an output signal for the case where the operation is continued for longer than the threshold time and the operation detecting CPU (404) outputs an output signal for the case of having detected the operation; or when the hardware circuit (403) outputs the output signal for the case where the operation is continued for longer than the threshold time and the operation detecting CPU (404) outputs an output signal different from the output signal for the case of having detected the operation.

A motor control unit controls a driving current that flows through a coil of a motor to be driven, by controlling a PWM signal supplied to an H bridge circuit constituted by FETs. A current value generation unit detects a driving current based on a voltage that occurs across a current detection resistor, and corrects a detection value by using a first or second correction value. The current value generation unit, if the driving current is detected in the H period of the PWM signal, corrects the detection value by using the first correction value, and if the driving current is detected in the L period of the PWM signal, corrects the detection value by using the second correction value that has a polarity different from a polarity of the first correction value.