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(Datasheet) ATMEGA1280

8-BIT Microcontroller

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ATMEGA1280 pdf
The ATmega640/1280/1281/2560/2561 provides the following features: 64K/128K/256K bytes of In-System Pro-
grammable Flash with Read-While-Write capabilities, 4Kbytes EEPROM, 8Kbytes SRAM, 54/86 general purpose
I/O lines, 32 general purpose working registers, Real Time Counter (RTC), six flexible Timer/Counters with com-
pare modes and PWM, four 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 mod-
ules 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 Key Suppression® (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 the Atmel 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 non-
volatile 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 opera-
tion. 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 system development
tools including: C compilers, macro assemblers, program debugger/simulators, in-circuit emulators, and evaluation
kits.
ATmega640/V-1280/V-1281/V-2560/V-2561/V [DATASHEET]
2549Q–AVR–02/2014
6
ATMEL Corporation
ATMEL Corporation


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