# US 2018/0024899 A1 · Electronic device, and method of controlling electronic device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0024899 A1 - Document ID: US20180024899A1 - Status: Published application - Kind: A1 - Application number: 15/653,631 - Filed: 2017-07-19 - Published: 2018-01-25 - Earliest claimed: 2016-07-20 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Yasusaburo Degura; Hidenori Shiba; Masakazu Nakadokoro - Web page: https://patentgrep.com/patent/US20180024899A1 ## CPC - G06F 11/221: {to test buses, lines or interfaces, e.g. stuck-at or open line faults} - G06F 11/2247: {Verification or detection of system hardware configuration} - G06F 13/00: Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units (interface circuits for specific input/output devices G06F3/00 {; multiprogram control therefor G06F9/46}; multiprocessor systems G06F15/16 ) - G06F 13/385: {for adaptation of a particular data processing system to different peripheral devices} - G06F 11/2215: {to test error correction or detection circuits} - H01R 13/7039: {the coupling part with coding means activating the switch to establish different circuits} - H01R 24/62: Sliding engagements with one side only, e.g. modular jack coupling devices - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS ## Abstract An electronic device has a first terminal for receiving power from a connected external device, a second terminal for obtaining information of the external device, and a GND terminal connected to the second terminal. The electronic device causes a resistance between the second terminal and the GND terminal to change, and determines a type of the external device based on a voltage of the first terminal after the resistance is caused to change. ## Claims ### Claim 1 An electronic device, comprising: a first terminal for receiving power from a connected external device; a second terminal for obtaining information of the external device; a GND terminal connected to the second terminal; a control unit configured to cause a resistance between the second terminal and the GND terminal to change; and a determination unit configured to determine a type of the external device based on a voltage of the first terminal after the control unit causes the resistance to change. ### Claim 2 (depends on 1) The electronic device according to claim 1, wherein the determination unit determines that the type of the external device is a first type in a case that the voltage of the first terminal after the control unit causes the resistance to change is equal to or less than a first threshold, and the determination unit determines that the type of the external device is a second type in a case that the voltage of the first terminal after the control unit causes the resistance to change is more than a first threshold. ### Claim 3 (depends on 2) The electronic device according to claim 2, further comprising an obtaining unit configured to obtain a power supply ability of the external device, wherein the obtaining unit, if the type of the external device is determined to be the first type, obtains the power supply ability of the external device based on a voltage of the second terminal. ### Claim 4 (depends on 2) The electronic device according to claim 2, further comprising an obtaining unit configured to obtain a power supply ability of the external device, wherein the obtaining unit, if the type of the external device is determined to be the second type, obtains the power supply ability of the external device based on a voltage of a third terminal that is different to the first terminal and the second terminal. ### Claim 5 (depends on 1) The electronic device according to claim 1, wherein the determination unit determines the type of the external device based on the voltage of the first terminal after the control unit changes the second terminal and the GND terminal from a state of being connected to one another via a predetermined resistor to a disconnected state. ### Claim 6 (depends on 1) The electronic device according to claim 1, wherein the determination unit determines the type of the external device based on the voltage of the first terminal after a predetermined period elapses since the control unit caused the resistance between the second terminal and the GND terminal to change. ### Claim 7 (depends on 6) The electronic device according to claim 6, wherein the predetermined period is less than or equal to 1000 msec. ### Claim 8 (depends on 1) The electronic device according to claim 1, further comprising a supply unit configured to supply the determination unit and the control unit with power. ### Claim 9 (depends on 8) The electronic device according to claim 8, wherein the supply unit is a capacitor charged by power received by the first terminal. ### Claim 10 (depends on 8) The electronic device according to claim 8, wherein the supply unit supplies the determination unit and the control unit with power obtained from the external device. ### Claim 11 (depends on 1) The electronic device according to claim 1, wherein the determination unit determines the type of the external device based on the voltage of the first terminal after the control unit switches from a state in which the second terminal and the GND terminal are not connected to a state where the second terminal and the GND terminal are connected. ### Claim 12 (depends on 11) The electronic device according to claim 11, further comprising a power storage unit configured to accumulate power obtained from the external device via the second terminal, and supply the determination unit and the control unit with power, wherein the power storage unit obtains power from the external device in the state in which the second terminal and the GND terminal are not connected. ### Claim 13 (depends on 12) The electronic device according to claim 12, further comprising a switch for controlling a connection between the second terminal and the power storage unit, wherein, if the electronic device is connected to the external device, the control unit controls so as to enter a state in which the second terminal and the GND terminal are not connected, and the switch controls so as to connect the second terminal and the power storage unit, in accordance with an accumulation of predetermined power in the power storage unit, the switch controls so that the second terminal and the power storage unit are not connected, and in accordance with the second terminal and the power storage unit entering a non-connected state, the control unit switches from the state in which the second terminal and the GND terminal are not connected to the state in which the second terminal and the GND terminal are connected. ### Claim 14 An electronic device, comprising: a first terminal for receiving power from a connected external device; a second terminal for obtaining information of the external device; a control unit configured to control a voltage of the second terminal; and a determination unit configured to determine a type of the external device in accordance with a voltage of the first terminal after a predetermined period has elapsed since the control unit changed the voltage of the second terminal from a voltage included in a predetermined range to a voltage not in the predetermined range. ### Claim 15 (depends on 14) The electronic device according to claim 14, wherein the voltage of the second terminal is used in determining whether or not the external device is in a connected state, and the voltage included in the predetermined range is a voltage for determining that the external device is in the connected state, and the voltage outside of the predetermined range is a voltage for determining that the external device is in a non-connected state. ### Claim 16 (depends on 14) The electronic device according to claim 14, wherein the determination unit determines that the type of the external device is a first type in a case that a voltage value of the first terminal changes to a voltage value included in a first range after the predetermined period elapses since the control unit controlled the voltage of the second terminal to the voltage outside of the predetermined range. ### Claim 17 (depends on 16) The electronic device according to claim 16, wherein the first range is a voltage range of less than or equal to 1.0V. ### Claim 18 (depends on 16) The electronic device according to claim 16, wherein the determination unit determines that the type of the external device is a second type in a case that the voltage value of the first terminal changes to a voltage value included in a second range, which differs the first range after the predetermined period elapses since the control unit controlled the voltage of the second terminal to the voltage outside of the predetermined range. ### Claim 19 (depends on 18) The electronic device according to claim 18, wherein the second range is a voltage range of 4.75V to 5.25V. ### Claim 20 (depends on 1) The electronic device according to claim 1, wherein the electronic device is provided with an interface that complies with USB Type-C, the first terminal is a VBUS terminal of the interface, and the second terminal is a CC terminal of the interface. ### Claim 21 (depends on 14) The electronic device according to claim 14, wherein the electronic device is provided with an interface that complies with USB Type-C, the first terminal is a VBUS terminal of the interface, and the second terminal is a CC terminal of the interface. ### Claim 22 (depends on 1) The electronic device according to claim 1, wherein the control unit changes the resistance between the second terminal and the GND terminal after the electronic device connects to the external device and before communicating with the external device via the second terminal. ### Claim 23 A control apparatus, comprising: a first control unit configured to control a power reception process for receiving power from a connected external device via a first terminal; a second control unit configured to control a resistance between a GND terminal and a second terminal that is for obtaining information of the external device; and a determination unit configured to determine a type of the external device based on a voltage value of the first terminal after a predetermined period elapses since the second control unit caused the resistance between the second terminal and the GND terminal to change, wherein the first control unit controls the power reception process in accordance with the type of the external device determined by the determination unit. ### Claim 24 A method of controlling an electronic device provided with a first terminal for receiving power from a connected external device, a second terminal for obtaining information of the external device, and a GND terminal connected to the second terminal, the method comprising: causing a resistance between the second terminal and the GND terminal to change; and determining a type of the external device based on a voltage of the first terminal after causing the resistance to change. ### Claim 25 A method of controlling an electronic device provided with a first terminal for receiving power from a connected external device, and a second terminal for obtaining information of the external device, the method comprising: changing a voltage of the second terminal from a voltage included in a predetermined range to a voltage outside of the predetermined range; and determining a type of the external device in accordance with a voltage of the first terminal after a predetermined period has elapsed since the voltage of the second terminal was changed to the voltage outside of the predetermined range. ### Claim 26 A method of controlling a control apparatus for controlling a power reception process for receiving power from a connected external device via a first terminal, the method comprising: changing a resistance between a GND terminal and a second terminal that is for obtaining information of the external device; determining a type of the external device based on a voltage value of the first terminal after a predetermined period has elapsed since changing the resistance between the second terminal and the GND terminal; and controlling the power reception process in accordance with the determined type of the external device.