![]() ![]() This erases the targeted area of the chip, which can then be rewritten. Flash memory uses in-circuit wiring to apply the electric field either to the entire chip or to predetermined sections known as blocks. The electrons in the cells of a flash-memory chip can be returned to normal ("1") by the application of an electric field, a higher-voltage charge. In this article, we'll find out how Flash memory works and look at some of the forms it takes and types of devices that use it. To change the value to a 0 requires a curious process called Fowler-Nordheim tunneling. As long as this link is in place, the cell has a value of 1. The floating gate's only link to the row, or wordline, is through the control gate. One of the transistors is known as a floating gate, and the other one is the control gate. The two transistors are separated from each other by a thin oxide layer. It has a grid of columns and rows with a cell that has two transistors at each intersection (see image below). PCMCIA Type I and Type II memory cards (used as solid-state disks in laptops)įlash memory is a type of EEPROM chip, which stands for Electronically Erasable Programmable Read Only Memory.Memory Stick (most often found in digital cameras).SmartMedia (most often found in digital cameras).CompactFlash (most often found in digital cameras). ![]()
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