PROM

From Saferpedia

The PROM (Programmable Read Only Memory) memory is a programmable ROM memory, non volatile. Non volatile memory has the capacity to store data even after the power supply was shut down. PROM are used to store permanent applications and represent a kind of digital memory where each bit's configuration is blocked by a safety.

The main difference between a ROM and a PROM is the fact that PROM's programming is applied after the device was built. A typical PROM comes with all its bits configured to read the value "1". Burning the safety of a bit trough programming makes that bit to read the value "0". PROM memories can be programmed only one time, the safety burning process being irreversible.

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