What is PROM Full Form?

The PROM full form is Programmable Read-Only Memory. This is a type of non-volatile computer memory. In this type, once the data is written it cannot be erased. We use PROM to store programmes and firmware for digital devices and microcontrollers.  

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What are the Uses of PROM?

Let us take a look at the uses of PROM:

• One of the most prevalent applications of PROM chips is to store important data. We cannot modify this stored data. It is used in medical systems or security systems. 
• One can program PROM using special devices such as a PROM burner or PROM programmer.
• PROMs are available in a wide range of shapes and sizes. It is used suitably depending on the type of use.
• They are either through-hole or surface-mount devices. They are usually made of silicon and other materials such as glass and ceramic.

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What are the Types of PROM?

Given below are the various types of PROMs:

• EEPROM – It is an electronically erasable PROM that enables the user to erase and reprogram using an electrical signal. This sets a good example of the difference between non-volatile and volatile memory.
• EPROM – Erasable PROM is a type of PROm that can be erased and reprogrammed using ultraviolet light.
• Flash EEPROM – Flash electronically erasable PROM allows the user to erase and reprogram in blocks instead of one byte at a time. This justifies the name of Flash EEPROM as it makes it faster to erase and program better than regular EEPROMs.
• APROM – Addressable PROM, is programmed without the use of any special device like a PROM programmer. It stores data in an array of cells. We can address these cells individually.
• MPROM – Masked PROM is programmed during its manufacturing process. We cannot erase or reprogram it.

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