×

Host device connectable to memory device performing patrol read and memory device performing patrol read

  • US 10,665,305 B2
  • Filed: 03/07/2016
  • Issued: 05/26/2020
  • Est. Priority Date: 09/09/2015
  • Status: Active Grant
First Claim
Patent Images

1. A memory device connectable to a host device, the memory device comprising:

  • a nonvolatile memory including a plurality of blocks; and

    a controller configured to;

    execute patrol read, the patrol read including reading first data, testing the read first data, and refreshing data stored inside a block including second data that is not successful in the test among the read first data, the first data being data of a certain unit stored in the nonvolatile memory, the testing including checking whether the read first data includes a bit error and counting a number of error bits of the read first data, the second data that is not successful in the test being data of which the number of error bits exceeds a certain threshold in the test, the refreshing selecting from a first refreshing or a second refreshing that is different from the first refreshing; and

    notify refreshing to be executed among the first refreshing and the second refreshing to the host device.

View all claims
  • 5 Assignments
Timeline View
Assignment View
    ×
    ×