Description
The AVR XMEGA is a family of low power, high performance, and peripheral rich 8/16-bit microcontrollers based on the AVR enhanced RISC architecture. By executing instructions in a single clock cycle, the AVR XMEGA device achieves throughputs CPU 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.The AVR XMEGA A3U devices provide the following features: 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, 50 general purpose I/O lines, 16-bit real-time counter (RTC); seven flexible, 16-bit timer/counters with compare and PWM channels; seven USARTs; two two-wire serial interfaces (TWIs); one full speed USB 2.0 interface; three serial peripheral interfaces (SPIs); AES and DES cryptographic engine; two 16-channel, 12-bit ADCs with programmable gain; one 2-channel 12-bit DAC; four analog comparators (ACs) with window mode; programmable watchdog timer with separate internal oscillator; accurate internal oscillators with PLL and prescaler; and programmable brown-out detection.The program and debug interface (PDI), a fast, two-pin interface for programming and debugging, is available. The devices also have an IEEE std. 1149.1 compliant JTAG interface, and this can also be used for boundary scan, on-chip debug and programming.The ATx devices have five software selectable power saving modes. The idle mode stops the CPU while allowing the SRAM, DMA controller, event system, interrupt controller, and all peripherals to continue functioning. The power-down mode saves the SRAM and register contents, but stops the oscillators, disabling all other functions until the next TWI, USB resume, or pin-change interrupt, or reset. In power-save mode, the asynchronous real-time counter continues to run, allowing the application to maintain a timer base while the rest of the device is sleeping. In standby mode, the external crystal oscillator keeps running while the rest of the device is sleeping. This allows very fast startup from the external crystal, combined with low power consumption. In extended standby mode, both the main oscillator and the asynchronous timer continue to run. To further reduce power consumption, the peripheral clock to each individual peripheral can optionally be stopped in active mode and idle sleep mode.
- High-performance, low-power Atmel® AVR® XMEGA® 8/16-bit Microcontroller
- Nonvolatile program and data memories
- 64K – 256KBytes of in-system self-programmable flash ?
- 4K – 8KBytes boot section ?
- 2K – 4KBytes EEPROM ?
- 4K – 16KBytes internal SRAM
- Peripheral features
- Four-channel DMA controller
- Eight-channel event system
- Seven 16-bit timer/counters
- Four timer/counters with four output compare or input capture channels
- Three timer/counters with two output compare or input capture channels
- High resolution extension on all timer/counters
- Advanced waveform extension (AWeX) on one timer/counter ? One USB device interface
- USB 2.0 full speed (12Mbps) and low speed (1.5Mbps) device compliant
- 32 Endpoints with full configuration flexibility
- Seven USARTs with IrDA support for one USART
- Two two-wire interfaces with dual address match (I2 C and SMBus compatible)
- Three serial peripheral interfaces (SPIs)
- AES and DES crypto engine
- CRC-16 (CRC-CCITT) and CRC-32 (IEEE® 802.3) generator
- 16-bit real time counter (RTC) with separate oscillator
- Two sixteen-channel, 12-bit, 2msps Analog to Digital Converters
- One two-channel, 12-bit, 1msps Digital to Analog Converter
- Four Analog Comparators with window compare function, and current sources
- External interrupts on all general purpose I/O pins
- Programmable watchdog timer with separate on-chip ultra low power oscillator
- QTouch® library support
- Capacitive touch buttons, sliders and wheels
- Special microcontroller features
- Power-on reset and programmable brown-out detection
- Internal and external clock options with PLL and prescaler
- Programmable multilevel interrupt controller
- Five sleep modes 8/16-bit Atmel XMEGA A3U Microcontroller ATxmega256A3U / ATxmega192A3U / ATxmega128A3U / ATxmega64A3U
- JTAG (IEEE 1149.1 compliant) interface, including boundary scan
- PDI (program and debug interface)
- I/O and packages
- 50 Programmable I/O pins
- 64-lead TQFP
- 64-pad QFN
- Operating voltage
- 1.6 – 3.6V
- Operating frequency
- 0 – 12MH
- from 1.6V
- 0 – 32MH
- from 2.7V
