Operating method of controller
AssigneeSK hynix Inc.
InventorSang Hune JUNG
Life of this patent
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Abstract
A memory system includes a nonvolatile memory device including a plurality of memory cells; and a controller including a control unit and a random-access memory, and configured to determine, by applying a program verify voltage to at least one memory cell to be programmed with program data, whether the program data is programmed, wherein the control unit determines percentages of a count of read requests received from a host device and a count of program requests received from the host device, and adjusts a level of the program verify voltage based on the percentages.
Claims10
An operation method of a controller, the method comprising:
- comparing a count of read requests and a count of program requests for a set time, wherein the read requests and the program requests are provided from a host;
- performing a first program operation to reduce a width of a threshold voltage distribution of memory cells to be programmed in response to comparing results which the count of the read requests is to greater than the count of the program requests;
- and
- performing a second program operation to increase the width of the threshold voltage distribution of the memory cells to be programmed in response to the comparing results which the count of the read requests is less than the count of the program requests.
An operation method of a controller, the method comprising:
- comparing a count of read requests and a count of program requests for a set time, wherein the read requests and the program requests are provided from a host;
- increasing a program time by changing a level of a program verify voltage according to a first comparing result which the count of the read requests is greater than the count of the program requests;
- and
- decreasing the program time by changing the level of the program verify voltage according to a second comparing result which the count of the read requests is less than the count of the program requests.
An operation method of a controller, the method comprising:
- controlling a nonvolatile memory device to perform a program operation with lower program verify voltage than an original program verify voltage when program requests are greater than read requests from a host by a first amount for a predetermined time;
- and
- controlling a nonvolatile memory device to perform a program operation with higher program verify voltage then the original program verify voltage when program requests are provided lesser than read requests from the host by a second amount for the predetermined time.
Dependencies are inferred from the claim text.