Question : Problem: Distinguish different type of RAM, ROM......

Dear sir,

  I would like to ask what is the differences among EEPROM,
EPROM, SRAM, Flash ROM and Flash RAM?

Thanks!

Benson

Answer : Problem: Distinguish different type of RAM, ROM......

eeprom means electrically erasable and programmable rom which means that a electrical current on one of the pins is enough to erase its contents.
eprom means erasable programmable rom and has to be erased with a
UV licht source (they can be recognised by the smal window which is covvered with a black square sticker to prevent losing the programmed data)
SRAM or static ram is a fast ram because the refresh is either very low or not nessesary at all(i'm not sure of this), which is why they were used as cache ram in "older" systems. DRAM or dynamic ram has a high refresh rate in order to maintain the integrity of the stored data and therefore is slower.
Flash ROM is a ROM module (used in modern pc's) which can be upgraded with software. When in use as a systembios you can update the bios program using a manufacturers flash file for the type of flashbios used (AWARD bios etc.)
About FLASH ram i'm not sure but the difference is that you don't need a special file to update the stored information.