Modified read operation for non-volatile memory
View Patent ↗A method may comprise executing a read operation to access a memory array by performing a preactive command to include a row-address-write operation and a bitline precharge and column selection operation and performing an activate command including a column-address-write operation and a row-decode-selection operation.
1. A method comprising:
executing a read operation to access a memory array by:
performing a preactive command to include a row-address-write operation and a bitline precharge and column selection operation; and
performing an activate command including a column-address-write operation and a row-decode-selection operation, wherein said activate command is performed more than once per said preactive command.
2. The method of claim 1 , wherein said activate command does not include said bitline precharge and column selection operation.
3. The method of claim 1 , further comprising performing said activate command after said bitline precharge and column selection operation.
4. The method of claim 1 , further comprising:
rearranging an order of address bits of an internal memory address; and
incorporating said internal memory address in said row address-write operation.
5. The method of claim 1 , further comprising:
providing a first memory address with said preactive command;
incorporating said first memory address in a bitline precharge and column selection operation;
providing a second memory address with said activate command; and
incorporating said second memory address in a row selection operation.
6. The method of claim 1 , wherein said memory array comprises a low power double data rate (LPDDR2) memory array.
7. A memory device comprising:
a memory controller to execute a read operation for accessing a memory array, said memory controller further being adapted to
perform a preactive command to include a row address-write operation and a bitline precharge and column selection operation; and
perform an activate command including a column-address-write operation and a row-decode-selection operation, wherein said activate command is performed more than once per said preactive command.
8. The memory device of claim 7 , wherein said activate command does not include said bitline precharge and column selection operation.
9. The memory device of claim 7 , said memory controller further adapted to perform said activate command after said bitline precharge and column selection operation.
10. The memory device of claim 7 , said memory controller further adapted to:
rearrange an order of address bits of an internal memory address; and
incorporate said internal memory address in said row address-write operation.
11. The memory device of claim 7 , said memory controller further adapted to:
provide a first memory address with said preactive command;
incorporate said first memory address in a bitline precharge and column selection operation;
provide a second memory address with said activate command; and
incorporate said second memory address in a row selection operation.
12. The memory device of claim 7 , wherein said memory array comprises a low power double data rate (LPDDR2) memory array.
13. A system comprising:
a memory device comprising an array of memory cells, said memory device further comprising a memory controller to:
execute a read operation to access said memory cells;
perform a preactive command to include a row address-write operation and a bitline precharge and column selection operation; and
perform an activate command including a column-address-write operation and a row-decode-selection operation, wherein said activate command is performed more than once per said preactive command; and
a processor to host one or more applications and to initiate said read command to said memory controller to provide access to said memory cells in said memory device.
14. The system of claim 13 , wherein said activate command does not include said bitline precharge and column selection operation.
15. The system of claim 13 , wherein said memory controller is adapted to perform said activate command after said bitline precharge and column selection operation.
16. The system of claim 13 , wherein said memory controller is adapted to:
rearrange an order of address bits of an internal memory address; and
incorporate said internal memory address in said row address-write operation.
17. The system of claim 13 , wherein said memory controller is adapted to:
provide a first memory address with said preactive command;
incorporate said first memory address in a bitline precharge and column selection operation;
provide a second memory address with said activate command; and
incorporate said second memory address in a row selection operation.