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What every programmer should know about memory, Part 1
What every programmer should know about memory, Part 1
Posted Sep 22, 2007 17:20 UTC (Sat) by ttonino (subscriber, #4073)Parent article: What every programmer should know about memory, Part 1
DRAM data has to be written back after every read: there is just enough charge in a cell to give a readable output on the bit line. That data must be written back when changing to another line.
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What every programmer should know about memory, Part 1
Posted Sep 22, 2007 17:42 UTC (Sat) by dskoll (subscriber, #1630) [Link]
DRAM data has to be written back after every read
That happens automatically. The sense amplifiers form a positive feedback loop that restores the charge in the capacitor. In fact, a refresh is performed just by doing a read (but throwing away the data.)