Portable device communicating with charger and operating method thereof

A portable device, comprising:

• a connection pin configured to be connected to an external pin of an external device;
• a power line communication module in communication with the external device via the connection pin and the external pin;
• a memory module;
• and
• a controller configured to control the power line communication module, wherein:
• the power line communication module:
• verifies a connection between the connection pin and the external pin and sends a first response signal to the external device based on a result of the connection verification,
• checks a battery status,
• based on the battery status having a first value, checks a battery charge amount,
• based on the battery charge amount exceeding a first reference amount, sets the battery status to a second value different from the first value,
• based on the battery charge amount not exceeding the first reference amount, leaves the battery status unchanged,
• based on the battery status having the second value, sends a second response signal to the external device,
• based on the battery charge amount being less than a second reference amount, sets the battery status to the first value, and
• based on the battery charge amount being not less than a second reference amount, transmits a third response signal to the external device;
• the power line communication module provides updated firmware data to the portable device.

An operating method of a portable device for performing power line communication with an external device via a connection pin, the operating method comprising:

• providing an update initiation signal commanding the external device to initiate a firmware update;
• wherein the update initiation signal command causes the external device to:
• verify a connection between the connection pin of the portable device and a pin of the external device and send a first response signal to the portable device based on a result of the connection verification,
• check, a battery status,
• based on the battery status having a first value, check a battery charge amount,
• based on the battery charge amount exceeding a first reference amount, set the battery status to a second value different from the first value,
• based on the battery charge amount not exceeding the first reference amount, leaving the battery status unchanged,
• based on the battery status having the second value send a second response signal to the portable device based on the battery status,
• based on the battery charge amount being less than a second reference amount sett the battery status to the first value, and
• based on the battery charge amount being not less than a second reference value, transmit a third response signal to the portable device;
• and
• providing firmware data, which has been previously stored in the portable device, to the external device.