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Calibration of flash channels in SSD

  • US 10,216,420 B1
  • Filed: 10/28/2016
  • Issued: 02/26/2019
  • Est. Priority Date: 07/24/2016
  • Status: Active Grant
First Claim
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1. A method for communicating with memory, performed by a memory controller, the method comprising:

  • sampling reads from a plurality of memory devices;

    storing first calibration points in first buffers, based on the sampling, with at least one first calibration point and corresponding first buffer for each of the plurality of memory devices;

    sampling a read from a second memory device in background while performing a read from a first memory device using the first calibration point in the first buffer corresponding to the first memory device;

    storing a second calibration point in a second buffer, for the second memory device, based on the sampling in the background, with the first buffer for the second memory device having the first calibration point used for ongoing reads of the second memory device;

    dumping at least the first calibration points from the plurality of first buffers to a memory, responsive to a power loss; and

    retrieving at least the first calibration points from the memory in recovering from the power loss, and using the first calibration points in the first buffers for further reads from the plurality of memory devices.

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