spi - External RAM (23LC1024) and external Flash (W25Q64JVSSIQ) with Sparkfun SAMD21 - Arduino Stack Exchange
Infineon's industry first space-qualified serial interface F-RAM provides 2 Mb density non-volatile storage for extreme environments - Semiconductor for You
avr11: building an SPI SRAM shield for an Arduino Mega | Dave Cheney
Serielle SPI-SRAM- und NVSRAM-Komponenten - Microchip | DigiKey
Connecting 128KB SPI-RAM to Arduino Mega | 8 Bit Force
Overview | Adafruit SPI FRAM Breakouts | Adafruit Learning System
Quad SPI nvSRAM - YouTube
Dual / Quad SPI Memory - Adesto | Mouser
Serial SRAM Circuit Diagram | Microchip expanded its serial … | Flickr
SPI RAM 4Mb Memory Module PMOD from MemorySolutions on Tindie