Control method for a memory device
AssigneeNS Poles Technology Corp.
InventorsYu Chou Ke, Shih Hong Jheng, Chun Chia Chen
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Abstract
A control method for a memory device uses an inverting data to label that a data stored in a memory block is in an inverting state or a non-inverting state. According to the inverting data, the number of bits whose data states is changed is lower than a half of total bits in the memory block in writing operation. Therefore, an energy consumption of the memory device can reduce. The control method of the present invention also can utilize the inverting data to label a memory block with a defective bit and to select a spare block to repair the memory block with a defective bit.
Claims7
A control method for a memory device, comprising the steps of:
- A. providing an inverting data to label a first data of a memory block as an inverting state or a non-inverting state, wherein said inverting data has at least two bits;
- B. while a second data is written into said memory device, writing said second data or a third data into said memory block according to said first data and said inverting data, wherein said third data is generated via inverting said second data;
- C. while a defective bit is detected in said memory block, changing at least one of said least two bits to be in a non-0 and non-1 state;
- and
- D. selecting one from a plurality of spare blocks to replace said memory block, wherein said inverting data labels said spare block selected to replace said memory block.
Dependencies are inferred from the claim text.