Electrostatic Discharge Detection and Data Storage Device Reaction
AssigneeWestern Digital Technologies, Inc.
InventorsShuli SHMAYA, Eran MOSHE
Life of this patent
Estimating the term…
Abstract
Instead of allowing an electrostatic discharge (ESD) event to cause a lost clock signal sync due effects of the ESD event causing an SSD to enter low power mode, utilizing ESD detection can be used to stop the reference clock signal to avoid involuntary low power mode. When an ESD event occurs, an ESD antenna sensor will selectivity disable sensitive signals and the reference clock signal. Once the ESD detector recognizes an ESD event has occurred, the device is able to enter freeze mode. While the reference clock signal is in freeze mode, the input signals are bypassed to avoid lost clock signal sync. Once the ESD event is done, the controller notifies the host to restart the reference clock signal and resume clock signal sync.
Claims20
A data storage device, comprising:
- a memory device;
- and
- a controller coupled to the memory device, wherein the controller is configured to:
- detect an electrostatic discharge (ESD) event has occurred;
- disable one or more signals;
- determine that impacts of the ESD event have sufficiently ended;
- and
- re-enable the one or more signals.
A data storage device, comprising:
- a memory device;
- and
- a controller coupled to the memory device, wherein the controller is configured to:
- detect an electrostatic discharge (ESD) event has occurred;
- freeze and input clock signal;
- and
- resync the input clock signal to a reference clock (REFCLK) signal from a host device.
A data storage device, comprising:
- means to store data;
- means to sense an electrostatic discharge (ESD) event has occurred;
- and
- a controller coupled to the means to store data and means to sense an ESD event has occurred, wherein the controller is configured to:
- detect that an ESD event has occurred;
- and
- prepare the data storage device to lose a reference clock (REFCLK) signal from a host device.
Dependencies are inferred from the claim text.