You're probably familiar with SRAM, DRAM, EEPROM and Flash but what
about FRAM? FRAM is 'ferroelectric' RAM, which has some very interesting
and useful properties. Unlike SRAM, FRAM does not lose the data when
power is lost. In that sense it's a durable storage memory chip like
Flash. However, it is much faster than Flash - and you don't have to
deal with writing or erasing pages.
This particular FRAM chip has 64 Kbits (8 KBytes) of storage,
interfaces using SPI, and can run at up to 20MHz SPI rates. Each byte can
be read and written instantaneously (like SRAM) but will keep the
memory for 95 years at room temperature. Each byte can be read/written
10,000,000,000,000 times so you don't have to worry too much about wear
leveling.
With the best of SRAM and Flash combined, this chip can let you buffer fairly-high speed data without worrying about data-loss.
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