On Sat, Dec 15, 2018 at 11:55 AM Chuck Guzis via cctalk < cctalk@classiccmp.org> wrote:
> On 12/15/18 10:01 AM, Guy Sotomayor Jr via cctalk wrote: > > FRAM or MRAM. I make extensive use of them in my projects. > > > > Everspin has a few (all SMT and 3.3v). As I recall they run ~$20/ea for > 4Mb (512K x 8 or 256K x 16). > > As neither MRAM nor FRAM requires a write-after-read refresh, I fail to > see the "realism" in this that couldn't be satisfied with simple > battery-backed RAM or even flash-backed RAM. > FRAM requires write-after-read refresh, but it's done internally to the part. That's why FRAM has limited read endurance; each read also does a write. FRAM endurance is typically 10^14 cycles (check the datasheet of a specific part), which is adequate for most uses.
