Memory system and method for improving write performance in a multi-die environment
AssigneeSanDisk Technologies LLC
InventorsHua-Ling Cynthia Hsu, Abhijeet Manohar, Victor Avila, Tien-Chien Kuo, Jong Hak Yuh
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Abstract
A memory system and method for improving write performance in a multi-die environment are disclosed. In one embodiment, a memory system is provided comprising a plurality of memory dies and a controller. The controller is configured to determine a programming status of each of the plurality of memory dies and dynamically adjust a maximum peak current limit of the plurality of memory dies based on the programming status of each of the plurality of memory dies. Other embodiments are provided.
Claims17
A memory system comprising:
- a plurality of memory dies;
- and
- a controller in communication with the plurality of memory dies, wherein the controller is configured to:
- perform the following before and after a program operation of each memory die:
- send a broadcast status command to the plurality of memory dies;
- receive an indication of programming status from each of the plurality of memory dies in response to the broadcast status command;
- and
- dynamically adjust a maximum peak current limit of the plurality of memory dies based on the indication of programming status received from each of the plurality of memory dies such that memory dies whose programming status is active receive a higher maximum peak limit than those memory dies whose programming status is inactive.
A method for improving write performance in a multi-die memory system, the method comprising:
- performing the following before and after a program operation of each memory die in a memory system comprising a plurality of memory dies, wherein the plurality of memory dies is associated with a current budget:
- sending a broadcast status command to the plurality of memory dies;
- receiving an indication from each memory die as to whether each memory die is active in response to the broadcast status command;
- and
- allocating current from the current budget only to the memory die(s) that are active, wherein the memory die(s) that are active are allocated more than their pro rata share of the current budget, thereby increasing performance of those memory die(s).
A memory system comprising:
- a plurality of memory dies;
- means for sending a broadcast status command to the plurality of memory dies before and after a program operation of each memory die;
- means for receiving indications from the plurality of memory dies in response to the broadcast status command to determine how many of the plurality of memory dies are being programmed;
- and
- means for making on-the-fly adjustments to change programming speeds of the memory dies that are being programmed based on how many of the plurality of memory dies are being programmed.
Dependencies are inferred from the claim text.