Electronic device and method for communicating with external device through power source line
An electronic device includes a battery, a charging integrated circuit (IC) configured to control a charging state of the battery, a connector pin for receiving power from an external device, the connector pin including a first connector pin for receiving a high potential voltage from the external device and a second connector pin for receiving a low potential voltage from the external device, a touch sensor, and a controller. The controller receives power from the external device through the connector pin based on the detection of the external device being connected to the connector pin, charges the battery using a high potential voltage, detects a user input through the touch sensor while the battery is charged, and stops the charging of the battery and outputs a current corresponding to state information of the electronic device through the first connector pin based on the detection of the given user input.
1. An electronic device for supplying power to an external device, comprising:
a housing including at least one groove for keeping the external device;
a connector pin configured to supply power to the external device, the connector pin comprising:
a first connector pin positioned in an area of the groove to supply a high potential voltage, and
a second connector pin positioned in another area of the groove to supply a low potential voltage;
a power supply configured to supply a given high potential voltage to the first connector pin;
a current sensing circuit configured to detect a current of the first connector pin; and
a controller operatively connected to the connector pin, the power supply, and the current sensing circuit,
wherein the controller is configured to:
supply a given high potential voltage to the first connector pin based on a detection of the external device being connected to the connector pin,
detect the current of the first connector pin while the given high potential voltage is supplied,
extract digital information based on a current change of a given range or more being detected in the first connector pin, and
perform a given function based on the extracted digital information.
2. The electronic device of claim 1 , further comprising a user interface device,
wherein the controller is further configured to:
identify a state of the external device based on the extracted digital information, and
control the user interface device to output a given notification related to the identified state of the external device.
3. The electronic device of claim 2 , wherein the state of the external device comprises the external device being in a Bluetooth pairing mode.
4. The electronic device of claim 2 , wherein the user interface device comprises an LED device.
5. The electronic device of claim 1 , further comprising a sensing resistor positioned between the power supply and the first connector pin,
wherein the current sensing circuit is configured to:
detect currents at both ends of the sensing resistor, and
transmit a comparison value between the currents at both ends of the sensing resistor to the controller.
6. The electronic device of claim 5 , wherein the controller is further configured to:
receive the comparison value from the current sensing circuit, and
extract the digital information based on a change in the current of the first connector pin based on the comparison value exceeding a reference value.
7. A method of driving an electronic device for supplying power to an external device,
wherein the electronic device comprises a housing including at least one groove for keeping the external device, a connector pin configured to supply power to the external device, the connector pin comprising a first connector pin positioned in an area of the groove to supply a high potential voltage and a second connector pin positioned in another area of the groove to supply a low potential voltage, a power supply configured to supply a given high potential voltage to the first connector pin, and a current sensing circuit configured to detect a current of the first connector pin, and
wherein the method comprises:
supplying a given high potential voltage to the first connector pin based on a detection of the external device being connected to the connector pin,
detecting the current of the first connector pin while the given high potential voltage is supplied,
extracting digital information based on a current change of a given range or more being detected in the first connector pin, and
performing a given function based on the extracted digital information.
8. The method of claim 7 , further comprising:
identifying a state of the external device based on the extracted digital information; and
outputting a given notification related to the identified state of the external device.
9. The method of claim 8 , wherein the state of the external device comprises the external device being in a Bluetooth pairing mode.
10. The method of claim 7 , wherein:
the electronic device further comprises a sensing resistor positioned between the power supply and the first connector pin; and
detecting the current of the first connector pin comprises:
detecting currents at both ends of the sensing resistor, and
identifying a comparison value between the currents at both ends of the sensing resistor.
11. The method of claim 10 , wherein extracting digital information comprises:
comparing the comparison value with a reference value; and
extracting the digital information based on a change in the current of the first connector pin based on the comparison value exceeding the reference value.