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Description
English: Organization of a semiconductor Dynamic RAM (DRAM) chip. Each bit of data is stored a memory cell. The cells (blue blocks) are laid out in an array of rows and columns on the chip. The memory address applied to the chip (A) is broken into two parts; a "row address" which is decoded by a row address decoder (green rectangle, left) to select one row of cells, and a "column address" which is decoded by a column address decoder (green rectangle, bottom) to select one of the cells in the active row. When the "Row Address Strobe" (RAS) line is asserted, the row of memory cells is activated, transferring the bit of data in each cell to the sense amplifiers (red blocks). When the "Column Address Strobe" (CAS) line is asserted, the column address decoder picks the bit from one column to output on the "Data" line.

The "write" process is similar, except that the Read/Write (R/W) line is asserted, so instead of reading a bit, a bit of data on the Data line is written by the selected sense amplifier into the memory cell.
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Author HandigeHarry
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5 March 2008

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current11:52, 5 March 2008Thumbnail for version as of 11:52, 5 March 2008400 × 400 (3 KB)HandigeHarry~commonswiki{{Information |Description=Dynamic ram |Source=self-made |Date=5 march 2008 |Author= HandigeHarry |Permission=PD |other_versions= }}

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