Memory Technology of Embedded System MCQ Quiz – Objective Question with Answer for Memory Technology of Embedded System

The low power consumption makes SRAM easily convertible to non-volatile memory, by adding a small battery it can retain its data even when the main power is lost.

DRAM is used in PCs and Embedded systems because of its low cost. SRAM, flash memory, and EEPROM are more costly than DRAM.

DRAM is highly denser and cheaper because it only uses a single capacitor for storing one bit.

DRAM uses a small capacitor whose voltage represents a binary zero which is used as a storage element in DRAM in which a single transistor cell is used to store each bit of data.

Four to six transistors are used to store a single bit of data and form a flip-flop logic gate and thus SRAM is faster in accessing data.

DRAM is said to be more volatile because it has a capacitor as its storage element in which the data disappears when the capacitor loses its charge so even when the device is powered the data can be lost.

Trench capacitors can store from 4-256 Mb but planar capacitors can store up to 1 Mb.

Stacked-cell can store greater than 1 Gb. The planar capacitor can store up to 1 Mb and the trench capacitor can store 4-256 Mb.

Both SRAM and DRAM are volatile memories and flash memory and EPROM are non-volatile memories. DRAM has a storage element like a capacitor whose charge loses gradually thereby losing data.