Atmel AVR ATXMEGA Microcontrollers with USB - INACTIVE Atmel AVR ATXMEGA Microcontrollers with USB offers 3 data memory features and various peripheral features. AVR ATXMEGA256A3B Microcontrollers feature 256 KB of in-system self-programmable flash, 4 KB of EEPROM and 16 KB of internal SRAM. AVR ATXMEGA256A3U Microcontrollers feature 64-256 KB of in-system self-programmable flash, 2-4 KB of EEPROM and 4-16 KB of internal SRAM. AVR ATXMEGA32A4U Microcontrollers feature 16-128 KB of in-system self-programmable flash, 1-2 KB of EEPROM and 2-8 KB of internal SRAM. AVR ATXMEGA256A3U and ATXMEGA32A4U Microcontrollers offer USB device interface USB 2.0 full speed (12Mbps) and low speed (1.5Mbps) device compliant and 32 endpoints with full configuration flexibility. Typical applications for Atmel AVR ATXMEGA Microcontrollers include optical, climate control, HVAC and Zigbee®. Learn More