HP-48 FRAM Cards

[Dave Frederickson]

(07-24-2016 02:28 AM)matthiaspaul Wrote:  If an extremely long operational life is paramount, this rules out the idea of using an FRAM card as memory expansion in slot 1.

Matthias,

What do you consider an extremely long time?

If we're to believe the information in the articles above, FRAM has endurance similar to that of SRAM. According to one of the articles, FRAM can endure 150,000 years of continuous data logging.

100 trillion write cycles in 150,000 years works out to around 21.1 writes/sec. If we expected the FRAM to endure for only 50 years, we could write data at 665 million writes/sec, continuously. That's a lot faster than the 48GX, so even if you could write data continuously you could do so for a lot more than 50 years.

Dave