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US 2004/0003315 A1Published application
Repairable block redundancy scheme
AssigneeMicron Technology, Inc.
InventorsVinod Lakhani, Benjamin Louie
Life of this patent
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Abstract
A scheme for block substitution within a flash memory device is disclosed which uses a programmable look-up table to store new addresses for block selection when certain input block addresses are received. The new addresses are loaded into a programmable fuse latch each time an address transition is detected in the input address. The new addresses may contain block addresses or block and bank addresses.
Claims66
A memory device, comprising:
- a plurality of memory blocks;
- a block remapping circuit for receiving a first address of a selected memory block to be used in a memory operation and for substituting a second memory block for the first memory block for use in said memory operation;
- said block remapping circuit comprising a look up table responsive to said first address to select a second address of said second memory block and a reloadable latch for receiving and latching said second address.
A processor system comprising:
- a processor;
- and
- a memory device coupled to supply data to said processor, said memory device comprising:
- a plurality of memory blocks;
- a block remapping circuit for receiving a first address of a selected memory block to be used in a memory operation and for substituting a second memory block for the first memory block for use in said memory operation;
- said block remapping circuit comprising a look up table responsive to said first address to select a second address of said second memory block and a reloadable latch for receiving and latching said second address.
3 more elements
A method of operating a memory device, said method comprising:
- receiving a first memory address identifying a memory block for a memory operation;
- using said first address to select a second address from a lookup table;
- loading said second address into a reloadable latch;
- and
- using said second address in said latch to select a memory block for said memory operation.
2 more elements
Dependencies are inferred from the claim text.