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What is the maximum time that the RAS signal can be asserted in the page mode operation?

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What is the maximum time that the RAS signal can be asserted in the page mode operation?

(a) 5 microseconds

(b) 10 microseconds

(c) 15 microseconds

(d) 20 microseconds

The question was asked in homework.

The query is from DRAM Interfaces topic in division Memory Systems of Embedded Systems

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The correct answer is (b) 10 microseconds

The best explanation: The maximum time that the RAS signal can be asserted during the page mode operation is about 10 microseconds. But this is a major disadvantage for page mode operation, that is, the standard PCs have a maximum time of 15 microseconds for the refresh cycle.

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