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ATMEGA1281-16AUR Datenblatt(PDF) 6 Page - ATMEL Corporation

Teilenummer ATMEGA1281-16AUR
Bauteilbeschribung  8-bit Atmel Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash
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Hersteller  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATMEGA1281-16AUR Datenblatt(HTML) 6 Page - ATMEL Corporation

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2549PS–AVR–10/2012
ATmega640/1280/1281/2560/2561
The Atmel
® AVR® core combines a rich instruction set with 32 general purpose working regis-
ters. All the 32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two
independent registers to be accessed in one single instruction executed in one clock cycle. The
resulting architecture is more code efficient while achieving throughputs up to ten times faster
than conventional CISC microcontrollers.
The ATmega640/1280/1281/2560/2561 provides the following features: 64K/128K/256K bytes of
In-System Programmable Flash with Read-While-Write capabilities, 4Kbytes EEPROM, 8
Kbytes SRAM, 54/86 general purpose I/O lines, 32 general purpose working registers, Real
Time Counter (RTC), six flexible Timer/Counters with compare modes and PWM, 4 USARTs, a
byte oriented 2-wire Serial Interface, a 16-channel, 10-bit ADC with optional differential input
stage with programmable gain, programmable Watchdog Timer with Internal Oscillator, an SPI
serial port, IEEE® std. 1149.1 compliant JTAG test interface, also used for accessing the On-
chip Debug system and programming and six software selectable power saving modes. The Idle
mode stops the CPU while allowing the SRAM, Timer/Counters, SPI port, and interrupt system
to continue functioning. The Power-down mode saves the register contents but freezes the
Oscillator, disabling all other chip functions until the next interrupt or Hardware Reset. In Power-
save mode, the asynchronous timer continues to run, allowing the user to maintain a timer base
while the rest of the device is sleeping. The ADC Noise Reduction mode stops the CPU and all
I/O modules except Asynchronous Timer and ADC, to minimize switching noise during ADC
conversions. In Standby mode, the Crystal/Resonator Oscillator is running while the rest of the
device is sleeping. This allows very fast start-up combined with low power consumption. In
Extended Standby mode, both the main Oscillator and the Asynchronous Timer continue to run.
Atmel offers the QTouch
® library for embedding capacitive touch buttons, sliders and wheels-
functionality into AVR microcontrollers. The patented charge-transfer signal acquisition
offersrobust sensing and includes fully debounced reporting of touch keys and includes Adjacent
KeySuppression
® (AKS) technology for unambiguous detection of key events. The easy-to-use
QTouch Suite toolchain allows you to explore, develop and debug your own touch applications.
The device is manufactured using Atmel’s high-density nonvolatile memory technology. The On-
chip ISP Flash allows the program memory to be reprogrammed in-system through an SPI serial
interface, by a conventional nonvolatile memory programmer, or by an On-chip Boot program
running on the AVR core. The boot program can use any interface to download the application
program in the application Flash memory. 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-bit RISC CPU with In-System Self-Programmable Flash on a monolithic chip,
the Atmel ATmega640/1280/1281/2560/2561 is a powerful microcontroller that provides a highly
flexible and cost effective solution to many embedded control applications.
The ATmega640/1280/1281/2560/2561 AVR is supported with a full suite of program and sys-
te m de velop m e n t to ols in clud in g: C c o m p ilers , m a cr o asse mb lers, p r og ra m
debugger/simulators, in-circuit emulators, and evaluation kits.


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