Difference between RAM and ROM in Embedded Systems

In embedded systems, RAM (Random Access Memory) and ROM (Read-Only Memory) are two types of memory that serve different purposes.

RAM (Random Access Memory)

RAM is a volatile memory that stores data temporarily while the system is powered on. It allows for quick read and write access, making it ideal for storing variables, stack, and heap data. RAM is used for storing data that needs to be accessed and modified frequently during program execution.

ROM (Read-Only Memory)

ROM is a non-volatile memory that stores data permanently and retains its contents even when the power is turned off. It is typically used to store firmware, boot code, and other essential software that is needed for the system to boot up and operate correctly. ROM is read-only, meaning that its contents cannot be modified once they are programmed.

How they are typically used

In embedded systems, RAM is used for storing temporary data that needs to be modified during program execution, while ROM is used for storing essential software and firmware that needs to be accessed but not modified. By utilizing both RAM and ROM effectively, embedded systems can achieve optimal performance and reliability.