Описание
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 devices achieve CPU throughput 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 B3 devices provide the following features: in-system programmable flash with read-while-write capabilities; internal EEPROM and SRAM; two-channel DMA controller, four-channel event system and programmable multilevel interrupt controller, 36 general purpose I/O lines, real-time counter (RTC); Liquid Crystal Display supporting up to 4×25 segment driver, ASCII character mapping and built-in contrast control (LCD); three flexible, 16-bit timer/counters with compare and PWM channels; one USARTs; one two-wire serial interface (TWI); one full speed USB 2.0 interface; one serial peripheral interface (SPI); AES and DES cryptographic engine; one 8-channel, 12-bit ADCs with programmable gain; four analog comparators (ACs) with window mode; programmable watchdog timer with separate internal oscillator; accurate internal oscillators with PLL and presale; and programmable brown-out detection.
- High-performance, low-power ® AVR® XMEGA® 8/16-bit Microcontroller
- Nonvolatile program and data memories
- 128KBytes of in-system self-programmable flash
- 2KBytes EEPROM
- 8KBytes internal SRAM
- Peripheral Features
- Two-channel DMA controller
- Four-channel event system
- Two 16-bit timer/counters
- One timer/counters with 4 output compare or input capture channels
- One timer/counter with 2 output compare or input capture channels
- High resolution extensions one timer/counter
- Advanced waveform extension (Awe) on one timer/counter
- Split mode on two timer/counters
- One USB device interface
- USB 2.0 full speed (12Mbps) and low speed (1.5Mbps) device compliant
- 32 Endpoints with full configuration flexibility
- One USARTs with IrDA support for one USART
- AES and DES crypto engine
- CRC-16 (CRC-CCITT) and CRC-32 (IEEE® 802.3) generator
- One two-wire interface with dual address match (I2C and SMBus compatible)
- One serial peripheral interface (SPI)
- 16-bit Real Time Counter (RTC) with separate oscillator
- Liquid Crystal Display
- Up to 4×25 segment driver
- Built in contrast control
- ASCII character mapping
- Flexible SWAP of segment and common terminals buses
- One eight-channel, 12-bit, 300 thousand SPS Analog to Digital Converters
- Two Analog Comparators with window compare function, and current source feature
- 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
- Operating Voltage: 1.6 – 3.6V
