4-Bit/8-Bit MCU

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 Tax 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 power-save mode, the LCD controller is allowed to refresh data to the panel. 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, and the LCD controller is allowed to refresh data to the panel. 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 AVR® XMEGA® 8- and16-bit Microcontroller
• Nonvolatile program and data memories
  • 128KBytes of in-system self-programmable flash
  • 2KBytes EEPROM
  • 8KBytes internal SRAM
• Special microcontroller features
  • Power-on reset and programmable brown-out detection
  • Internal and external clock options with PLL
  • Programmable multilevel interrupt controller
  • Five sleep modes
  • Programming and debug interfaces
  • JTAG (IEEE 1149.1 Compliant) interface, including boundary scan
  • PDI (Program and Debug Interface)
• I/O and packages
  • 53 Programmable I/O pins
  • 100-lead TQFP, 100-ball VFBGA