View at76c711 datasheet:

Features • AVR® Microcontroller • Clock Generator Provides CPU Rates up to 24 MHz • Programmable UART with 16-byte FIFOs at the Receiver Side (1), with a Maximum Rate of 921K Baud • Programmable SPI Interface • Full-speed USB Function Controller • 2K Bytes of SRAM for Data, Stack and Program Variables • 2K Bytes of Dual-port RAM, Shared among the USB, UART and AVR • 8K x 16-bit SRAM for Program Execution • Internal ROM for the Bootstrap Loader AVR®-based • One USB Control Endpoint • Six USB Programmable Endpoints (up to 64 Bytes) with Double-buffered FIFOs for Bridge between Back-to-back Transfers • One 8-bit Timer/Counter Full-speed USB • One 16-bit Timer/Counter • External and Internal Interrupt Sources and Fast Serial • Programmable Watchdog Timer • Independe