Memory array and measuring and testing methods for inter-hamming differences of memory array

A method for measuring inter-hamming difference of a memory array divided into a plurality of sections, comprising:

• obtaining a plurality of first contents of the plurality of sections from the memory array when the memory array is operating in a first operating condition;
• obtaining a plurality of second contents of the plurality of sections from the memory array when the memory array is operating in a second operating condition, wherein power supplies, operation frequencies or operation temperatures of the first and second operating conditions are different;
• obtaining a plurality of inter-hamming differences between the first and second contents, wherein the inter-hamming difference represents the number of unlike bits between the first content of one section of the plurality of sections and the second content of another section of the plurality of sections;
• and
• obtaining an inter-hamming difference range according to a maximum inter-hamming difference and a minimum inter-hamming difference among the inter-hamming differences.

A method for testing a memory array divided into a plurality of sections, comprising:

• applying a first operating condition to the memory array, and obtaining a plurality of first contents of the plurality of sections from the memory array operating in the first operating condition;
• after storing the first contents, applying a second operating condition to the memory array, and obtaining a plurality of second contents of the plurality of sections from the memory array operating in the second operating condition;
• obtaining a plurality of inter-hamming differences between the stored first contents and the second contents, wherein the inter-hamming difference represents the number of unlike bits between the stored first content of one section of the plurality of sections and the second content of another section of the plurality of sections;
• and
• obtaining a test result of the memory array according to a maximum inter-hamming difference and a minimum inter-hamming difference among the inter-hamming differences.