US 12,002,508 B2 · On-chip non-volatile memory (NVM) search

Abstract

The disclosure relates in some aspects to on-chip processing circuitry formed within the die of a non-volatile (NVM) array to perform data searches. In some aspects, the die includes components configured to sense wordlines of stored data in the NVM array by applying voltages on the wordlines serially, and then search for an input data pattern within the serially-sensed wordlines. In some examples, the components of the die include latches and circuits configured to perform bitwise latch logic search operations. In other examples, the search components are configured with under-the-array or next-to-the-array dedicated search circuitry that uses registers and/or random access memory (RAM). Other aspects relate to a separate controller device for controlling the on-chip NVM search operations. For example, the controller may determine whether to search for data using search components of the NVM die or processors of the controller based, e.g., on a degree of fragmentation of data.

Claims19

Dependent claims

An apparatus, comprising:

a non-volatile memory (NVM) die configured to store scrambled data that has been scrambled using a scrambling pattern that is a function of a storage unit index;
and
a processor configured to:
receive a search command from a host comprising a search pattern identifying information to search for within the scrambled data;
send the search command to the NVM die;
control the NVM die to search for the information within the scrambled data stored on the NVM die by using the search pattern and the scrambling pattern that is the function of the storage unit index to identify the information within the scrambled data that matches the search pattern without first unscrambling the scrambled data;
and
receive search results from the NVM die.

5 more elements

An apparatus, comprising:

a component configured to obtain a search command identifying information to search for within data on a non-volatile memory (NVM) die coupled to the apparatus;
and
a processor configured to:
determine whether to search for the information using search circuitry within the NVM die or instead using a search component of the apparatus;
in response to a determination to search using the search circuitry within the NVM die, control the NVM die to search for the information using the search circuitry of the NVM die by being further configured to subdivide a search pattern into subdivided search patterns and to submit a first one of the subdivided search patterns to the NVM die for searching by the search circuitry of the NVM die within the data on the NVM die;
and
in response to a determination to instead search for the information using the search component of the apparatus, read data from the NVM die and search for the information within the data using the search component of the apparatus.

4 more elements

Dependencies are inferred from the claim text.

On-chip non-volatile memory (NVM) search

Life of this patent

On-chip non-volatile memory (NVM) search

Life of this patent

Abstract

Claims19