TS-7180 FRAM
From embeddedTS Manuals
The TS-7180 has 16Kbit ferroelectric random access memory (FRAM) organized as 2KB. It is accessible via the SPI bus.
The FRAM may be accessed from userspace. It will appear as an EEPROM at: /sys/class/spi_master/spi2/spi2.2/eeprom
The datasheet is available from Cypress Semiconductors' website.