Brief Introduction of the Application: Quad SPI Flash is mainly applied in EEPROM, FLASH, AD Converter, SPI FLASH in automobile or industry, digital signal processor, digital signal decoder and even the PCs BIOS data transmission. With its advantages of few pins and high efficiency, Quad SPI Flash is widely used in various small 3C products. Function Introduction: Quad SPI is the updated version of Dual SPI. It is a kind of serial SPI, but having a higher transmission speed (40MB/s, double of that of Dual SPI) and lower working voltage. Compared with normal parallel rapid memory of 32 pins or 48 pins, it only needs 6 pins (CLK, CS, IO0-3), so it can cut the cost sharply and reduce the PCB size and power consumption. Several years ago it had already been used for BIOS data storing in PC devices. 【DOWNLOAD】