AT43USB351M Overview
The Atmel AT43USB351M is a USB AVR-based microcontroller that is configurable as a low-speed or full-speed USB device. Its program memory is a 24-Kbyte mask programmable ROM and its data memory is 1-Kbyte SRAM. The on-chip peripherals consists of 19 general-purpose I/O ports, two timer-counters, SPI serial interface, a.