 Hello and welcome to the presentation of the STM32 Quad SPI memory interface. The Quad SPI memory interface integrated inside STM32 products provides a communication interface allowing the microcontroller to talk to external SPI and Quad SPI memories. This interface is fully configurable, allowing easy connection of any external serial memories available today on the market. Applications can benefit from the easy connection of Quad SPI memories, requiring only few pins. Thanks to the memory mapping feature, external memories can be simply accommodated in the existing project whenever more memory space is needed. Execute in place, XIP, is a method of executing programs directly from long-term storage rather than copying it into RAM. This slide demonstrates how Quad SPI benefits from the low amount of pins that are required to connect to the microcontroller versus standard external NOR flash memory. To measure the performance of the Quad SPI, we use a simple benchmark reading a 10 kilobyte table from the Quad SPI into internal RAM. We use for comparison the internal flash and internal SRAM memories too. The code itself is executed from the internal flash memory. In single data rate mode at 80 MHz, the internal flash memory is 40% faster than the external Quad SPI. But in double data rate mode at 48 MHz, the Quad SPI takes advantage of its prefetch mechanism and is even a little bit faster than the internal flash memory access. The STM32's L power consumption is higher when using the Quad SPI flash memory because of high autoglink.