Once written, the new data will rem ain in the device forever--or at least until it is electrically erased. The primary tradeoff for this im proved functionality is higher cost, though write cycles are also significantly longer than writes to a RAM. So you wouldnt want to use an EEPROM for your main system memory Flash memory combines the best features of the memory devices described thus far. Flash memory devices are high density, low cost, nonvolatile啡易失性的),fast( to read, but not to write), and electrically reprogrammable. These advantages are overwhelming(压倒性的and, as a direct result, the use of flash memory has increased dramatically in em bedded systems From a software viewpoint, flash and EEPROM technologies are very similar. The major difference is that flash devices can only be erased one sector at a time, not byte-by-byte. Typical sector sizes are in the range 256 bytes to 16KB. Despite this disadvantage, flash is much more popular than EEPROM and is rapidly displacing many of the ROM devices as welll 2021/220P12021/2/20 P.11 Once written, the new data will remain in the device forever--or at least until it is electrically erased. The primary tradeoff for this improved functionality is higher cost, though write cycles are also significantly longer than writes to a RAM. So you wouldn't want to use an EEPROM for your main system memory. Flash memory combines the best features of the memory devices described thus far. Flash memory devices are high density, low cost, nonvolatile(非易失性的), fast (to read, but not to write), and electrically reprogrammable. These advantages are overwhelming(压倒性的)and, as a direct result, the use of flash memory has increased dramatically in embedded systems. From a software viewpoint, flash and EEPROM technologies are very similar. The major difference is that flash devices can only be erased one sector at a time, not byte-by-byte. Typical sector sizes are in the range 256 bytes to 16KB. Despite this disadvantage, flash is much more popular than EEPROM and is rapidly displacing many of the ROM devices as well