What is a ROM (Read-Only Memory)

What is ROM?

Read-Only Memory, commonly abbreviated as ROM, is a type of non-volatile memory used in computers and other electronic devices. Unlike RAM, data stored in ROM cannot be modified easily, making it ideal for permanent data storage.

Types of ROM

• MROM (Masked ROM): The original type of ROM, programmed during manufacturing.
• PROM (Programmable ROM): Can be programmed once using a special device.
• EPROM (Erasable Programmable ROM): Can be erased and reprogrammed using UV light.
• EEPROM (Electrically Erasable Programmable ROM): Can be erased and reprogrammed electronically.

Applications of ROM

ROM is widely used in various devices, including:

• Embedded systems
• Firmware storage
• BIOS in computers
• Game cartridges

Advantages of ROM

• Non-volatile storage ensures data is retained even when power is off.
• Reliable and durable for long-term data storage.
• Ideal for storing firmware and software that doesn’t require frequent updates.