Datasheet

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.