what happens if power loss during fram write?

Using Arduino Storage
#1

Hello all,

First post so I hope I don't screw up. I am working on a project using arduino nano and an optical encoder. The plan is to count pulses on the encoder and every so often (few seconds) save the count to a fram module (adafruit I2C Fram Breakout with MB85RC256VPF FRAM chip). My question is: what happens if there is power loss during the writing process? Obviously the data would not be written but could it also corrupt the value already in the fram? I can live with loosing some pulses but if the data being overwritten could also be lost, then I would have to set up some kind of power failure routine to stop any writing. Thanks in advance for any comments.

#2

I'd assume that it will be corrupt. The Adafruit FRAM only writes a byte at a time, so even if individual bytes don't get corrupted (no idea if this is true) a power failure half way through writing your data might leave you with an inconsistent state.

#3

Makes perfect sense. Thank you for your time.

#4