FRAM for data-logging and metering
The FM25V02-GTR is a 256Kbit Ferroelectric RAM (FRAM) from Infineon's F-RAM™ series, organized as 32K x 8 bits. It combines non-volatile storage with SRAM-like write speed and endurance — no write-cycle wear limits, no battery backup needed. Typical applications include industrial metering, data logging, and point-of-sale terminals where frequent, fast writes to non-volatile memory are required.
SPI interface and timing
Communication is over an SPI bus running at up to 40 MHz. The 256Kbit density maps to 32K addressable bytes, read or written in a single SPI transaction.