Serial Flash 4Mbit
Winbond W25X40CL 4Mbit (512KB) serial SPI flash memory chip. 8-SOIC JEDEC package (3.9mm width, 0.154").
Can be soldered to Moteino (R2) for data logging purposes or for wireless programming.
Or you may order your Moteino with the Flash chip pre-soldered.
Arduino SPIFlash library and example: https://github.com/LowPowerLab/SPIFlash
Related blog post: http://lowpowerlab.com/blog/2013/04/04/spiflash-memory-library-for-arduinomoteino/
Note: for wireless programming you will need to be running this modified version of Optiboot bootloader on the target Moteino: https://github.com/LowPowerLab/DualOptiboot
You will need to burn that bootloader using an AVR programmer. Future Moteinos will ship with this bootloader.