USB Speed: Full Speed (12Mbps) USB Transfer Modes: Bulk, Isochronous, Interrupt. Interfaces: FIFO, SPI, USB, UART. USB Host: Yes. Packages: 32-pin LQFP, 32-pin QFN, 48-pin LQFP, 48-pin QFN. Channels: 2. I/O Voltage: 3.3V. USB Class: Various. Virtual Com Port: No.