X SerialFlash provides low-latency, high performance access to SPI Flash memory with a filesystem-like interface for use with Arduino compatible boards.
For SPI Flash use in x4 mode Quad Enable bit must be set in.
#Spi programmer software serial
SPI bus is a synchronous serial data link standard from Motorola which operates in duplex mode. Usually winbond spi flash is chiper than same dataflash from Atmel such as AT45DB***, now these flash from winbond is widely used in laptops as BIOS chip. The interface was developed by Motorola in the mid-1980s and has become a de facto standard. The Serial Peripheral Interface is a brilliant invention. I'd now like to lay spiffs on top of that.
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