The chip stores information as follows:
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When writing to dynamic memory, the row address first latches RAS to the chip, then the column address latches CAS to the chip, WE is valid, write data, then the written data is stored in the specified cell.
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When the dynamic memory is read out, the CPU first outputs the RAS latch signal to obtain the row address of the data storage unit, and then outputs the CAS latch signal to obtain the column address of the data storage unit, and maintains WE=1, it can read the data in the storage unit with a known row address.