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???
11/24/04 11:05
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#81824 - NV ram
Responding to: ???'s previous message

A quick visit to http://www.maxim.com will answer most if not all of your questions. They have battery-backed memories and battery backup controller ics - try MAX691 - it's quite popular.

Non-voltaile ram is normally battery backed up.

EEprom/Flash does not require a battery but has write limitations.

FRAM is a new technology that has fast read and write and does not require a battery. See http://www.ramtron.com

You also have a choice of serial ram/eeprom or parallel. The parallel devices hook up to the cpu bus and appear as XRAM.

Serial devices require a couple of port pins to talk SPI,I2C etc. Serial devices normally are smaller in both size and capacity and are slower to read/write due to their serial nature.


As to which technology and interface you choose depends on the application.




List of 9 messages in thread
TopicAuthorDate
Nonvolatile Ram with microcontroller            01/01/70 00:00      
   NV ram            01/01/70 00:00      
   Is serial RAM OK???            01/01/70 00:00      
      Parallel FRAM is available!            01/01/70 00:00      
   flash memory            01/01/70 00:00      
      Why not flash            01/01/70 00:00      
   "1Mbit FRAM drop-in SRAM replacement"            01/01/70 00:00      
      fram vs flash & eerom            01/01/70 00:00      
   NV RAM            01/01/70 00:00      

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