The figure on this slide shows a block diagram of the SPIFI peripheral. The SPIFI function is connected to the microcontroller’s Application High-speed Bus (AHB) matrix, which is used for the processor core and the on-chip memories. The SPIFI peripheral presents the contents of the external serial flash in the microcontroller’s memory map. Once the boot code in the on-chip ROM initializes the SPIFI interface, the external flash memory looks just like an on-chip memory to the central processing unit. Two of the key advantages of a system designed with SPIFI and serial flash are: extending an application’s data storage in non-volatile memory by adding any one of the wide variety of supported serial flash devices in the market and adding the capability to execute instructions from external flash with high CPU efficiency, including the capability on some products to boot directly to the serial flash using the on-chip boot loader. These methods provide the opportunity to improve cost, performance and PCB space while adding flexibility in application size for your design.