MICROCHIP ATXMEGA256A3U-AN

The AVR XMEGA AU microcontrollers is a family of low-power, high-performance, and peripheral-rich CMOS 8/16-bit microcontrollers based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the Atmel AVR XMEGA AU devices achieve throughputs approaching one million instructions per second (MIPS) per megahertz, allowing the system designer to optimize power consumption versus processing speed. The AVR CPU combines a rich instruction set with 32 general purpose working registers. All 32 registers are directly connected to the arithmetic logic unit (ALU), allowing two independent registers to be accessed in a single instruction, executed in one clock cycle. The resulting architecture is more code efficient while achieving throughputs many times faster than conventional single-accumulator or CISC based microcontrollers.

• in-system programmable flash with read-while-write capabilities
• internal EEPROM and SRAM
• four-channel DMA controller
• eight-channel event system and programmable multilevel interrupt controller
• up to 78 general purpose I/O lines
• 16- or 32-bit real-time counter (RTC)
• up to eight flexible, 16-bit timer/counters with capture, compare and PWM modes
• up to eight USARTs
• up to four I²C and SMBUS compatible two-wire serial interfaces (TWIs)
• one full-speed USB 2.0 interface
• up to four serial peripheral interfaces (SPIs)
• CRC module
• AES and DES cryptographic engine
• up to two 16-channel, 12-bit ADCs with programmable gain
• up to two 2-channel, 12-bit DACs
• up to four analog comparators with window mode
• programmable watchdog timer with separate internal oscillator