a What are the key properties of the FLASH memory technology

a. What are the key properties of the FLASH memory technology that distinguish it from standard

SRAM and DRAM?

b. How are these properties exploited in system design?

c. Briefly show how the design of the memory cell results in these properties.

Solution

a.

SRAM

DRAM

Flash

SRAM is Volatile

DRAM is Volatile

Flash is non-Volatile

Which is a benefit in case of sudden power interrupt

SRAM is Writable

DRAM is Writable

Flash is also Writable

SRAM erase size is byte

DRAM also have erase size of byte

Flash memory have erase size of sector so it becomes easier to erase data from flash memory faster

SRAM maximum erase size is unlimited

DRAM maximum erase size is unlimited

Flash memory maximum erase size is limited which protects it from getting hanged in case of large size of data erase

SRAM cost to erase data per byte is expensive

DRAM cost to erase data per byte is expensive

Flash memory cost to erase data per byte is moderate

SRAM speed is fast

DRAM speed is good

Flash memory provides the best optimized speed to read and to write data

b.

The System design of flash memory must exibits all of these properties in oreder to ensure optimization of work needed to be done.

The flash memory is divided into sectors just like a hard disk drive which makes it more easier to erase data, the flash memory doesnt have regular mosfet which makes it non volatile and less cost to erase the data.

The system design of flash memory is found to very similar to hard disk drive.