The MT6261 is a highly integrated, low-power, and cost-effective chip designed by MediaTek, a leading fabless semiconductor company. This chip is widely used in various applications, including USB-based devices. To facilitate seamless communication between the MT6261-based device and a host computer, a USB driver is required. In this write-up, we will delve into the details of the MT6261 USB driver, its functionality, and significance.