The ATXMEGA32A4-MH is a low power, high-performance 8-bit CMOS Microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the XMEGA A4 achieves throughputs approaching 1MIPS per MHz 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 the 32 registers are directly connected to the arithmetic logic unit (ALU), allowing two independent registers to be accessed in one 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. The XMEGA A4 device provides 32kB self-programming flash program memory, 4kB boot code section, 4kB SRAM, 1024byte EEPROM and up to 32MIPS throughput at 32MHz.
● Power-on reset and programmable brown-out detection
● Internal and external clock options with PLL and prescaler
● Programmable multilevel interrupt controller
● Sleep modes - Idle, power-down, standby, power-save, extended standby
● Advanced programming, test and debugging interfaces - PDI for programming, test and debugging
● 4-channel DMA controller with support for external requests
● 8-channel Event system
● Five 16-bit timers/counters
● Five USARTs
● Two 2-wire Interfaces with dual address match (I²C and SMBus compatible)
● Two SPI (serial peripheral interface) peripherals
● AES and DES crypto engine
● 16-bit Real-time counter with separate oscillator
● One 12-channel, 12-bit, 2MSPS Analog-to-digital converter
● One 2-channel, 12-bit, 1MSPS Digital to analog converter
● 2 Analog comparators with window compare function
● External interrupts on all general purpose I/O pins
● Programmable watchdog timer with separate on-chip ultra low power oscillator
