Method of resetting storage device, storage device performing the same and data center including the same

A storage device comprising:

• a power-loss protection integrated circuit (PLP IC) configured to generate an internal power supply voltage based on an external power supply voltage;
• a reset detector configured to generate a first reset control signal that is activated or deactivated based on a level of the internal power supply voltage;
• a reset controller configured to generate a final reset control signal based on the first reset control signal and a second reset control signal that is activated or deactivated with a timing different from that of the first reset control signal, the final reset control signal being activated or deactivated with a timing different from those of the first reset control signal and the second reset control signal;
• and
• a storage controller configured to control an operation of the storage device, and to perform a reset operation based on the final reset control signal when the external power supply voltage is turned off.

A method of resetting a storage device, the method comprising:

• generating an internal power supply voltage based on an external power supply voltage, the internal power supply voltage having a level lower than or equal to a level of the external power supply voltage;
• generating a driving voltage based on one of the external power supply voltage and the internal power supply voltage;
• generating a first reset control signal by detecting the level of the internal power supply voltage such that the first reset control signal is activated when the level of the internal power supply voltage is higher than a reference level and deactivated when the level of the internal power supply voltage is lower than or equal to the reference level;
• generating a second reset control signal that is activated when a power-on or a booting operation of the storage device being completed or deactivated after a predetermined delay time from when the external power supply voltage is turned off;
• generating a final reset control signal based on the first reset control signal and the second reset control signal, the final reset control signal that is activated when at least one of the first reset control signal and the second reset control signal is activated and deactivated when the first and second reset control signals are deactivated;
• generating a power off detection signal by detecting the level of the internal power supply voltage when the external power supply voltage is turned on or turned off;
• and
• when the external power supply voltage is turned off, performing a reset operation based on the final reset control signal and the driving voltage,
• wherein the second reset control signal is a signal that is generated based on an off ready signal provided from a storage controller included in a storage device or based on the power off detection signal,
• wherein the final reset control signal maintains an activation level for a predetermined time after the external power supply voltage is turned off, and
• wherein the reset operation is performed based on the final reset control signal having the activation level and the driving voltage generated based on the internal power supply voltage.