ATmega16U4 Datasheet | Atmel

ATmega16U4/ATmega32U4 8-bit Microcontroller with 16/32K bytes of ISP Flash and USB Controller Features - High Performance, Low Power AVR® 8-Bit Microcontroller - Advanced RISC Architecture - 135 Powerful Instructions - Most Single Clock Cycle Execution - 32 x 8 General Purpose Working Registers - Fully Static Operation - Up to 16 MIPS Throughput at 16MHz - On-Chip 2-cycle Multiplier - Non-volatile Program and Data Memories - 16/32KB of In-System Self-Programmable Flash - 1.25/2.5KB Internal SRAM - 512Bytes/1KB Internal EEPROM - Write/Erase Cycles: 10,000 Flash/100,000 EEPROM - Data retention: 20 years at 85C/ 100 years at 25C(1) - Optional Boot Code Section with Independent...