Voltage adjustment based on pending refresh operations
Methods, systems, and devices for voltage adjustment based on, for example, pending refresh operations are described. A memory device may periodically perform refresh operations to refresh volatile memory cells and may at times postpone performing one or more refresh operations. A memory device may determine a quantity of pending (e.g., postponed) refresh operations, such as by determining a quantity of refresh intervals that have elapsed without receiving or executing a refresh command, among other methods. A memory device may pre-emptively adjust (or cause to be adjusted) a supply voltage associated with the memory device or memory device component based on the quantity of pending refresh operations to prepare for the current demand associated with the performing the one or more pending refresh operations. For example, the memory device may increase a supply voltage associated with one or more components to prepare for performing multiple pending refresh operations.
1 . An apparatus, comprising:
a memory device;
a voltage source configured to provide a supply voltage to the memory device; and
a controller coupled with the memory device, wherein the controller is operable to cause the apparatus to:
identify a quantity of received refresh commands;
determine a quantity of refresh operations by determining a difference between a quantity of refresh intervals and the quantity of received refresh commands; and
adjust the supply voltage associated with the memory device for a duration based at least in part on the quantity of refresh operations and based at least in part on determining that the quantity of refresh operations satisfies a threshold.
2 . The apparatus of claim 1 , wherein the controller is operable to cause the apparatus to:
determine, after adjusting the supply voltage, a second quantity of refresh operations by determining a second difference between a second quantity of refresh intervals and a second quantity of received refresh commands;
determine that the second quantity of refresh operations satisfies a second threshold; and
re-adjust the supply voltage based at least in part on determining that the second quantity of refresh operations satisfies the second threshold.
3 . The apparatus of claim 1 , wherein the controller is operable to cause the apparatus to:
identify a window duration, wherein identifying the refresh intervals and the refresh commands comprises identifying the refresh intervals and the refresh commands during the window duration.
4 . The apparatus of claim 1 , wherein to identify the refresh intervals, the controller is operable to cause the apparatus to:
increment a refresh interval counter for each elapsed refresh interval.
5 . The apparatus of claim 1 , further comprising:
a refresh interval counter associated with the memory device, wherein to identify the refresh commands, the controller is operable to cause the apparatus to:
decrement the refresh interval counter for each received refresh command.
6 . The apparatus of claim 1 , wherein the controller is operable to cause the apparatus to:
identify the quantity of refresh intervals, wherein identifying the quantity of received refresh commands is based at least in part on identifying the quantity of refresh intervals.
7 . The apparatus of claim 1 , wherein the controller is operable to cause the apparatus to:
determine that the quantity of refresh operations satisfies the threshold, wherein adjusting the supply voltage associated with the memory device for the duration is based at least in part on determining that the quantity of refresh operations satisfies the threshold.
8 . The apparatus of claim 1 , wherein to adjust the supply voltage associated with the memory device, the controller is operable to cause the apparatus to:
increase the supply voltage from a first voltage to a second voltage.
9 . The apparatus of claim 8 , wherein a value of the second voltage is based at least in part on the quantity of refresh operations.
10 . The apparatus of claim 1 , wherein the controller is operable to cause the apparatus to:
receive a first refresh command after adjusting the supply voltage;
increase the quantity of received refresh commands based at least in part on receiving the first refresh command; and
adjust the quantity of refresh operations based at least in part on increasing the quantity of received refresh commands.
11 . The apparatus of claim 10 , wherein the controller is operable to cause the apparatus to:
re-adjust the supply voltage based at least in part on adjusting the quantity of received refresh commands.
12 . The apparatus of claim 1 , wherein the controller is operable to cause the apparatus to:
transmit a signal indicating a target voltage based at least in part on the quantity of refresh operations, wherein adjusting the supply voltage comprises adjusting the supply voltage based at least in part on the target voltage.
13 . A method, comprising:
counting a quantity of refresh intervals associated with refreshing memory cells of a memory device, the memory device comprising a power management component for providing a supply voltage to the memory device;
transmitting a signal from the memory device to the power management component based at least in part on the quantity of refresh intervals, wherein the signal indicates a target voltage of the supply voltage; and
adjusting the supply voltage based at least in part on transmitting the signal.
14 . The method of claim 13 , wherein adjusting the supply voltage comprises:
increasing the supply voltage from a first voltage to a second voltage based at least in part on the quantity of refresh intervals.
15 . The method of claim 14 , wherein a value of the second voltage is based at least in part on the quantity of refresh intervals.
16 . An apparatus, comprising:
a memory device;
a voltage source configured to provide a supply voltage to the memory device; and
a controller coupled with the memory device, wherein the controller is operable to cause the apparatus to:
adjust, before performing at least a subset of a quantity of pending refresh operations and based at least in part on the quantity of pending refresh operations, the supply voltage associated with the memory device, wherein adjusting the supply voltage comprises increasing the supply voltage from a first voltage to a second voltage based at least in part on the quantity of pending refresh operations; and
perform at least some of the pending refresh operations based at least in part on adjusting the supply voltage associated with the memory device.
17 . The apparatus of claim 16 , further comprising:
a power management component associated with the memory device, wherein the controller is operable to cause the apparatus to:
transmit a signal indicating a target voltage of the supply voltage based at least in part on the quantity of pending refresh operations, wherein adjusting the supply voltage comprises adjusting, by the power management component, the supply voltage based at least in part on the target voltage.
18 . The apparatus of claim 16 , further comprising:
a power management component associated with the memory device, wherein the controller is operable to cause the apparatus to:
transmit a signal indicating a target voltage of the supply voltage based at least in part on the quantity of pending refresh operations, wherein adjusting the supply voltage comprises adjusting, by the power management component, the supply voltage based at least in part on the target voltage.
19 . The apparatus of claim 16 , wherein the controller is operable to cause the apparatus to:
determine the quantity of pending refresh operations, wherein adjusting the subset of the quantity of pending refresh operations is based at least in part on determining the quantity of pending refresh operations.
20 . The apparatus of claim 16 , wherein a value of the second voltage is based at least in part on a quantity of refresh intervals associated with memory cells of the memory device.