Memory system
First Claim
1. A memory system comprising:
- a non-volatile memory including a plurality of blocks, each one of the plurality of blocks being a data erase unit; and
a controller configured to assign one part of the plurality of blocks to a main memory area and to assign another part of the plurality of blocks to a cache area, whereineach block is divided into multiple management units,a plurality of data stored in the main memory area are managed with logical addresses, each logical address representing a first management unit,a plurality of data stored in the cache area are managed with logical addresses, each logical address representing a second management unit,the size of each second management unit is smaller than the size of each first management unit and the size of each of the first and second management units is smaller than the size of the data erase unit, andthe controller dynamically changes the number of the blocks assigned to the main memory area and the number of the blocks assigned to the cache area in the non-volatile memory.
5 Assignments
0 Petitions
Accused Products
Abstract
A memory system includes a non-volatile memory constituted by blocks each of which is an erase unit constituted by pages each of which is a write/read unit constituted by memory cells; a random access memory temporarily storing data which is written in or read from the non-volatile memory; and a controller controlling the non-volatile memory and the random access memory, wherein the non-volatile memory includes a main memory area in which the block is divided into first management units respectively specified by logical addresses and a cache area in which the block is divided into second management units respectively specified by logical addresses, a data capacity of one of the second management units is smaller than that of one of the first management units, and the controller changes number of the blocks in the main memory area and number of the blocks in the cache area in the non-volatile memory.
6 Citations
14 Claims
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1. A memory system comprising:
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a non-volatile memory including a plurality of blocks, each one of the plurality of blocks being a data erase unit; and a controller configured to assign one part of the plurality of blocks to a main memory area and to assign another part of the plurality of blocks to a cache area, wherein each block is divided into multiple management units, a plurality of data stored in the main memory area are managed with logical addresses, each logical address representing a first management unit, a plurality of data stored in the cache area are managed with logical addresses, each logical address representing a second management unit, the size of each second management unit is smaller than the size of each first management unit and the size of each of the first and second management units is smaller than the size of the data erase unit, and the controller dynamically changes the number of the blocks assigned to the main memory area and the number of the blocks assigned to the cache area in the non-volatile memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification