Nonvolatile RAM also known as NVRAM,is a special RAM variation that is able to hold its data eve after external power is removed.There are two common types of NVRAM.The first type of NVRAM is known as battery-backed RAM,contains a static RAM along with it own permanently connected battery.When external power is removed or drops below a certain threshold,the internal battery maintains power to the SRAM and thus the memory continues the to store the bits.The second type of NVRAM contains a Static RAM as well as an EEPROM or flash having the same capacity as the Static RAM.This type of NVRAM stores its complete RAM contents into the EEPROM just before the power is turned off,or whenever instructed to store the data and then reloads that data from EEPROM into RAM after power is turned back on. Friday, February 13, 2009
Nonvolatile RAM
Nonvolatile RAM also known as NVRAM,is a special RAM variation that is able to hold its data eve after external power is removed.There are two common types of NVRAM.The first type of NVRAM is known as battery-backed RAM,contains a static RAM along with it own permanently connected battery.When external power is removed or drops below a certain threshold,the internal battery maintains power to the SRAM and thus the memory continues the to store the bits.The second type of NVRAM contains a Static RAM as well as an EEPROM or flash having the same capacity as the Static RAM.This type of NVRAM stores its complete RAM contents into the EEPROM just before the power is turned off,or whenever instructed to store the data and then reloads that data from EEPROM into RAM after power is turned back on. 
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