What is ROM

ROM stands for Read-Only Memory. It's a type of non-volatile memory used in computers and other electronic devices.

Key Features of ROM:

• Non-volatile: It retains data even when the power is turned off.
• Read-only: Data is written during manufacturing (or in some cases, later), but it typically can't be modified or erased by the user.
• Used to store firmware: This includes software that boots up a device or performs essential low-level operations.

Types of ROM:

1. Masked ROM – Programmed during the manufacturing process.
2. PROM (Programmable ROM) – Can be programmed once after manufacturing.
3. EPROM (Erasable PROM) – Can be erased using UV light and reprogrammed.
4. EEPROM (Electrically Erasable PROM) – Can be erased and rewritten electrically.

Common Uses:

• BIOS in PCs
• Embedded systems
• Game cartridges
• Microcontrollers