Paragraph 140
Paragraph 140
Application
Calibrating non-volatile memory read thresholds
Matter Number
US10998041B1
Paragraph Number
140
Application Number
16869424
Reference Case 1
US10998041B1
Reference Case 2
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Created
12/22/21, 12:00 AM
Modified
12/22/21, 12:00 AM
Id
6,380
Content
FIG. 5 illustrates example encoding for multi-level storage cells 500. Using a gray code encoding enables a logical page to be read with fewer read operations because the encoding ensures that only on bit changes between adjacent memory states. For example, the erased state Er may be represented by "1111" and may transition to memory state A to represent "1110", in which the bit that changed is the least significant bit. FIG. 5 illustrates four pages Page 1 504, Page 2 506, Page 3 508, and Page 4 510. Each page may be read one at a time. For example, Page 1 504 may be read, then Page 2 506, etc., and four page reads may thus be needed to determine which of the QLC memory states 502 is represented at a particular memory cell.
Notes
Added by DJM 12 2021