An EPROM (rarely EROM), or erasable programmable read-only memory, is a type of memory chip that retains its data when its power supply is switched off. Computer memory that can retrieve stored data after a power supply has been turned off and back on is called non-volatile.
Unlike EPROM chips, EEPROMs do not need to be removed from the computer to be modified. However, an EEPROM chip has to be erased and reprogrammed in its entirety, not selectively. It also has a limited life - that is, the number of times it can be reprogrammed is limited to tens or hundreds of thousands of times.
So, what are RAM, ROM, and flash memory? All three are kinds of computer memory, but RAM, ROM, and flash memory interact each in their own way with the data that they store. Here’s a quick explanation of each kind of memory: RAM: Stands for random access memory; refers to memory that the microprocessor can read from and write to. When you create something in memory, it’s done in RAM.
Programmable ROM Updated: 10/17/2017 by Computer Hope Alternatively referred to as a FPROM (Field Programmable Read Only Memory) or OTP (one-time programmable) chip, PROM or Programmable ROM (Programmable Read Only Memory) is a computer memory chip that can be programmed once after it has been created.
Synchronous DRAM (SDRAM) Definition - What does Synchronous DRAM (SDRAM) mean? Synchronous dynamic random access memory (SDRAM) is dynamic random access memory (DRAM) with an interface synchronous with the system bus carrying data between the CPU and the memory controller hub.