US 12,625,649 B2 · Volatile memory, system on chip and electronic device comprising the same

Abstract

A volatile memory device comprises a memory cell array including a plurality of memory cells storing data, and control logic controlling read and write operations for the plurality of memory cells. The control logic is configured to receive a command instructing a self-refresh operation from an external host device, to perform the self-refresh operation in response to the received command, to request the external host device to transfer data stored in the plurality of memory cells in response to a performance time of the self-refresh operation having elapsed a first threshold time, to monitor a read command received from the external host device in response to receiving a notification of self-refresh operation termination and a read command from the external host device, and to enter a power off state in response to the read command not being received for a second threshold time.

Claims20

Dependent claims

A volatile memory device comprising:

a memory cell array including a plurality of memory cells configured to store data;
and
control logic configured to control read and write operations for the plurality of memory cells,
wherein the control logic is configured to
receive a command instructing a self-refresh operation from an external host device,
perform the self-refresh operation in response to the received command,
request the external host device to issue an initial read command to transfer data stored in the plurality of memory cells in response to a performance time of the self-refresh operation having elapsed a first threshold time,
monitor for an additional read command received from the external host device in response to receiving both a notification of self-refresh operation termination and the initial read command from the external host device, and
enter a power off state in response to the additional read command not being received after a second threshold time has elapsed.

6 more elements

A System on Chip (SoC) comprising:

a first interface configured to communicate with a volatile memory device;
a second interface configured to communicate with a non-volatile memory device;
and
a controller configured to control the first and second interfaces,
wherein the controller is configured to
transmit a command to the volatile memory device instructing to perform a self-refresh operation,
receive a request from the volatile memory device to transfer data stored in the volatile memory device to the non-volatile memory device,
determine whether the volatile memory device has performed the self-refresh operation in response to a vehicle being powered off,
upon determining that the volatile memory device has performed the self-refresh operation in response to the vehicle being powered off, transmit a read command to the volatile memory device in response to the request,
upon determining that the volatile memory device has not performed the self-refresh operation in response to the vehicle being powered off, transmit a command instructing the self-refresh operation to the volatile memory device in response to the request,
the controller is further configured to receive data corresponding to the read command from the volatile memory device,
store the received data in the non-volatile memory device,
receive a control signal from a sensor, and
power on the volatile memory device in response to the control signal.

11 more elements

An electronic device configured to be included in a vehicle, the electronic device comprising:

a volatile memory device configured to store first data used for an operation of the vehicle;
a non-volatile memory device configured to store second data used for the operation of the vehicle;
a sensor configured to output a control signal in response to receiving a detection signal from at least one of a door, a seat, and a seat belt of the vehicle;
and,
a System on Chip (SoC) configured to power on the volatile memory device in response to the control signal received from the sensor, and to control the volatile memory device and the non-volatile memory device,
wherein the volatile memory device is configured to
receive a command instructing a self-refresh operation from the SoC,
perform the self-refresh operation in response the received command,
request the SoC to transfer data stored in the volatile memory device to the non-volatile memory device in response a performance time of the self-refresh operation having elapsed a first threshold time,
wherein the SoC is configured to,
upon determining that the volatile memory device has performed the self-refresh operation in response to the vehicle being powered off, in response to the request,
transmit a read command to the volatile memory device,
receive data corresponding to the read command from the volatile memory device, and
store the received data in the non-volatile memory device,
and upon determining that the volatile memory device has not performed the self-refresh operation in response to the vehicle being powered off, in response to the request,
transmit a command instructing the self-refresh operation the volatile memory device.

13 more elements

Dependencies are inferred from the claim text.

Volatile memory, system on chip and electronic device comprising the same

Life of this patent

Volatile memory, system on chip and electronic device comprising the same

Life of this patent

Abstract

Claims20