What is "dataflash"

DataFlash is a low pin-count serial interface for flash memory. It was developed as an Atmel proprietary interface, compatible with the SPI standard. In October 2012, the AT45 series DataFlash product lines, related intellectual property, and supporting employee teams were purchased by Adesto Technologies.

Information is written and read from a DataFlash device using any microcontroller, such as the Atmel AVR, the Microchip PIC or the ARM. The boot ROM of numerous Atmel ARM microcontrollers support downloading code from DataFlash chips after reset.