The GL3520-OS322 with USB ICs is a 64-pin quad flat-no-lead (QFN) integrated circuit (IC) manufactured by Genesys. It is a RoHS-compliant and lead-free (Pb-free) product, featuring a USB 2.0 full-speed (FS) interface. It integrates a variety of peripheral functions, including an universal asynchronous receiver/transmitter (UART), local bus port (LBP), master mode universal host controller, a single direct memory access (DMA) channel, two interrupt channels (INTs), and a set of non-volatile memory (NVM) programming signals. The device supports 32KB/64KB of onboard RAM and program storage, and is compatible with both host-side and device-side USB applications. It is designed for low-power and cost-effective designs, and supports Windows, Mac OS X, and Linux operating systems.