1. Introduction The FT231X is a popular USB to Full Handshake UART (Universal Asynchronous Receiver-Transmitter) bridge controller chip manufactured by FTDI (Future Technology Devices International) . It is widely used to provide USB connectivity to legacy serial devices and is a staple component in development boards (such as Arduino derivatives), industrial controllers, and consumer electronics. Ls Land Issue 12 Siren Drive 01 15 Apr 2026