Each port gives read and/or write access to …… memory address

Single ported memories can access several addresses simultaneously

Each memory location has the same address

Memory address usually starts at zero

An address is represented by an signed integer

A word addressable memory: each word has its own address

Used only as a temporary storage

Volatile, it loses its data when the power is turned off

RAM is used in embedded systems or any systems where the programming doesn’t need to change.

Must be provided with constant power supply. If the power is interrupted, then the data are lost

the data and instructions in PROM (Programable ROM) can be changed

in ......no special tools are required for erasure and you can erase only portions of the chip, one
byte at a time.

......Is some kind of EEROM

In …. Data can be written or erased in blocks, so it is faster

SRAM stores data as a charge on a capacitor

During writing operation, a voltage signal is applied as …. For high

During writing operation, a voltage signal is applied as …. For low

data values are transferred from the capacitor to the bit line

data values are transferred from the bit line to the capacitor

..........Destroys the bit value stored on the capacitor, so data word must be restored rewritten after each read

a ....... requires the supporting refresh circuitry