ATXMEGA32A4U-MH データシートの表示（PDF） - Atmel Corporation

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ATXMEGA32A4U-MH

8/16-bit Atmel XMEGA Microcontroller

Atmel Corporation 

3. Overview

The Atmel 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 A4U 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, 34 general purpose I/O lines, 16-bit real-time counter (RTC); five flexible,

16-bit timer/counters with compare and PWM channels; five USARTs; two two-wire serial interfaces (TWIs); one full

speed USB 2.0 interface; two serial peripheral interfaces (SPIs); AES and DES cryptographic engine; one twelve-

channel, 12-bit ADC with programmable gain; one 2-channel 12-bit DAC; two 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 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.

Atmel offers a free QTouch library for embedding capacitive touch buttons, sliders and wheels functionality into AVR

microcontrollers.

The devices are manufactured using Atmel high-density, nonvolatile memory technology. The program flash memory

can be reprogrammed in-system through the PDI. A boot loader running in the device can use any interface to

download the application program to the flash memory. The boot loader software in the boot flash section will continue

to run while the application flash section is updated, providing true read-while-write operation. By combining an 8/16-

bit RISC CPU with in-system, self-programmable flash, the AVR XMEGA is a powerful microcontroller family that

provides a highly flexible and cost effective solution for many embedded applications.

All Atmel AVR XMEGA devices are supported with a full suite of program and system development tools, including C

compilers, macro assemblers, program debugger/simulators, programmers, and evaluation kits.

XMEGA A4U [DATASHEET]

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Atmel-8387H-AVR-ATxmega16A4U-34A4U-64A4U-128A4U-Datasheet_09/2014

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