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This document contains complete and detailed description of all modules included in the Atmel®AVR®XMEGA®AU microcontroller family. The Atmel AVR XMEGA AU is a family of low-power, high-performance, and peripheral-rich CMOS 8/16-bit microcontrollers based on the AVR enhanced RISC architecture. The available Atmel.
AVR XMEGA AU modules described in this manual are:
1. Atmel AVR CPU
2. Memories
3. DMAC - Direct memory access controller
4. Event system
5. System clock and clock options
6. Power management and sleep modes
7. System control and reset
8. Battery backup system
9. WDT - Watchdog timer
10. Interrupts and programmable multilevel interrupt controller
11. PORT - I/O ports
12. TC - 16-bit timer/counters
13. AWeX - Advanced waveform extension
14. Hi-Res - High resolution extension
15. RTC - Real-time counter
16. RTC32 - 32-bit real-time counter
17. USB - Universal serial bus interface
18. TWI - Two-wire serial interface
19. SPI - Serial peripheral interface
20. USART - Universal synchronous and asynchronous serial receiver and transmitter
21. IRCOM - Infrared communication module
22. AES and DES cryptographic engine
23. CRC - Cyclic redundancy check
24. EBI - External bus interface
25. ADC - Analog-to-digital converter
26. DAC - Digital-to-analog converter
27. AC - Analog comparator
28. IEEE 1149.1 JTAG interface
29. PDI - Program and debug interface
30. Memory programming
31. Peripheral address map
32. Register summary
33. Interrupt vector summary
34. Instruction set summary
Features
1. 8/16-bit, high-performance Atmel AVR RISC CPU
2. 142 instructions
3. Hardware multiplier
4. 32x8-bit registers directly connected to the ALU
5. Stack in RAM
6. Stack pointer accessible in I/O memory space
7. Direct addressing of up to 16MB of program memory and 16MB of data memory
8. True 16/24-bit access to 16/24-bit I/O registers
9. Efficient support for 8-, 16-, and 32-bit arithmetic
10. Configuration change protection of system-critical features
