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RAM problem - a question concerning RAM, memory leak?

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vlsi123

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RAM Question

Hello,


Please can anybody tell me the answer for this questions.? asap..?

The silicon of a new device has memory leak. When all "0" are written into RAM, it reads back all "0" whithout any problem. When all "1" are written, only 80% of memory cells are read back correctly. What can be possibly the problem with the RAM?


thanks a lot..
vlsi123
 

RAM Question

An address decoder is usually causes a 1/(2^n) fault, n determining where in the decoder circuit the fault lies given how many column/row selects you have, so it will fall on 100%, 50%, 25%... faulty, depending on the size of your decoder array, if 25% where faulty this would mean 75% read OK. How close do you have to match the 80% is it 'exactly' or 'about'.

Do you have more information on the type of memory and its implementation?
 

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