Patent ID: 11941269
Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 14:
15. A data storage device, comprising:
a non-volatile memory device including one or more memory dies, wherein each of the one or more memory dies include a plurality of input-output (I/O) lines;
a power supply circuit configured to provide power to the data storage device; and
a controller configured to:
receive an instruction to enter a low-power operating mode,
enter the low-power operating mode by:
removing power from the one or more memory dies
providing an output signal toggling between a first voltage level and a second voltage level at a predetermined frequency to the plurality of I/O lines, and
removing the output signal upon a voltage of the plurality of I/O lines falling below a predetermined threshold;

activate a write protect input of the non-volatile memory device to write protect the one or more memory dies upon entering the low-power operating mode,
apply a lower-level voltage to one or more power rails of the non-volatile memory device using the power supply circuit, and
maintain the activation of the write protect input and the application of the lower-level voltage while in the low-power operating mode,
wherein the lower-level voltage is less than a normal operating mode voltage.