An UART is a device allowing the transmission and reception of information, in a serial and asynchronous way. This paper details the design and implementation of SoC's UART-SPI converter. The UART-SPI converter provides usage for the Universal Asynchronous Receiver/Transmitter (UART) to Serial PerIpheral converter (SPI). This converter can be used to communicate to SPI slave devices from a PC with UART port. The converter consists of three blocks: the UART converter, the UART -to SPI interfacing block and the SPI master converter.