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PDF ATMEGA1280 Data sheet ( Hoja de datos )
| Número de pieza | ATMEGA1280 | |
| Descripción | 8-BIT Microcontroller | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Atmel ATmega640/V-1280/V-1281/V-2560/V-2561/V
8-bit Atmel Microcontroller with 16/32/64KB In-System Programmable Flash
Features
• High Performance, Low Power Atmel® AVR® 8-Bit Microcontroller
• Advanced RISC Architecture
– 135 Powerful Instructions – Most Single Clock Cycle Execution
– 32 × 8 General Purpose Working Registers
– Fully Static Operation
– Up to 16 MIPS Throughput at 16MHz
– On-Chip 2-cycle Multiplier
• High Endurance Non-volatile Memory Segments
– 64K/128K/256KBytes of In-System Self-Programmable Flash
– 4Kbytes EEPROM
– 8Kbytes Internal SRAM
– Write/Erase Cycles:10,000 Flash/100,000 EEPROM
– Data retention: 20 years at 85C/ 100 years at 25C
– Optional Boot Code Section with Independent Lock Bits
• In-System Programming by On-chip Boot Program
• True Read-While-Write Operation
– Programming Lock for Software Security
• • Endurance: Up to 64Kbytes Optional External Memory Space
Atmel® QTouch® library support
– Capacitive touch buttons, sliders and wheels
– QTouch and QMatrix acquisition
– Up to 64 sense channels
• JTAG (IEEE® std. 1149.1 compliant) Interface
– Boundary-scan Capabilities According to the JTAG Standard
– Extensive On-chip Debug Support
– Programming of Flash, EEPROM, Fuses, and Lock Bits through the JTAG Interface
• Peripheral Features
– Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode
– Four 16-bit Timer/Counter with Separate Prescaler, Compare- and Capture Mode
– Real Time Counter with Separate Oscillator
– Four 8-bit PWM Channels
– Six/Twelve PWM Channels with Programmable Resolution from 2 to 16 Bits
(ATmega1281/2561, ATmega640/1280/2560)
– Output Compare Modulator
– 8/16-channel, 10-bit ADC (ATmega1281/2561, ATmega640/1280/2560)
– Two/Four Programmable Serial USART (ATmega1281/2561, ATmega640/1280/2560)
– Master/Slave SPI Serial Interface
– Byte Oriented 2-wire Serial Interface
– Programmable Watchdog Timer with Separate On-chip Oscillator
– On-chip Analog Comparator
– Interrupt and Wake-up on Pin Change
• Special Microcontroller Features
– Power-on Reset and Programmable Brown-out Detection
– Internal Calibrated Oscillator
– External and Internal Interrupt Sources
– Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby,
and Extended Standby
• I/O and Packages
– 54/86 Programmable I/O Lines (ATmega1281/2561, ATmega640/1280/2560)
– 64-pad QFN/MLF, 64-lead TQFP (ATmega1281/2561)
– 100-lead TQFP, 100-ball CBGA (ATmega640/1280/2560)
– RoHS/Fully Green
• Temperature Range:
– -40C to 85C Industrial
• Ultra-Low Power Consumption
– Active Mode: 1MHz, 1.8V: 500µA
– Power-down Mode: 0.1µA at 1.8V
• Speed Grade:
– ATmega640V/ATmega1280V/ATmega1281V:
• 0 - 4MHz @ 1.8V - 5.5V, 0 - 8MHz @ 2.7V - 5.5V
– ATmega2560V/ATmega2561V:
• 0 - 2MHz @ 1.8V - 5.5V, 0 - 8MHz @ 2.7V - 5.5V
– ATmega640/ATmega1280/ATmega1281:
• 0 - 8MHz @ 2.7V - 5.5V, 0 - 16MHz @ 4.5V - 5.5V
– ATmega2560/ATmega2561:
• 0 - 16MHz @ 4.5V - 5.5V
DATASHEET
2549Q–AVR–02/2014
1 page  
2. Overview
The ATmega640/1280/1281/2560/2561 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced
RISC architecture. By executing powerful instructions in a single clock cycle, the
ATmega640/1280/1281/2560/2561 achieves throughputs approaching 1 MIPS per MHz allowing the system
designer to optimize power consumption versus processing speed.
2.1 Block Diagram
Figure 2-1. Block Diagram
VCC
PF7..0
PK7..0
PJ7..0
PE7..0
RESET
GND
XTAL1
XTAL2
PA7..0
PG5..0
Power
Supervision
POR/ BOD &
RESET
Watchdog
Timer
Watchdog
Oscillator
Oscillator
Circuits /
Clock
Generation
PORTA (8)
PORT G (6)
PORT F (8)
PORT K (8)
PORT J (8)
PORT E(8)
JTAG
EEPROM
XRAM
A/D
Converter
Internal
Bandgap reference
CPU
Analog
Comparator
16 bit T/C3
16 bit T/C5
16 bit T/C4
FLASH
SRAM
16 bit T/C1
USART 0
USART 3
USART 1
PC7..0
PORT C (8)
TWI
SPI
8 bit T/C0
8 bit T/C2
USART 2
NOTE:
Shaded parts only available
in the 100-pin version.
Complete functionality for
the ADC,T/C4, and T/C5 only
available in the 100-pin version.
PORTD (8)
PORT B (8)
PORTH (8)
PORTL (8)
PD7..0
PB7..0
PH7..0
PL7..0
The Atmel® AVR® core combines a rich instruction set with 32 general purpose working registers. All the 32 regis-
ters 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.
ATmega640/V-1280/V-1281/V-2560/V-2561/V [DATASHEET]
2549Q–AVR–02/2014
5
5 Page 
7. AVR CPU Core
7.1 Introduction
This section discusses the AVR core architecture in general. The main function of the CPU core is to ensure cor-
rect program execution. The CPU must therefore be able to access memories, perform calculations, control
peripherals, and handle interrupts.
7.2 Architectural Overview
Figure 7-1. Block Diagram of the AVR Architecture
Data Bus 8-bit
Flash
Program
Memory
Instruction
Register
Instruction
Decoder
Control Lines
Program
Counter
Status
and Control
32 x 8
General
Purpose
Registers
ALU
Interrupt
Unit
SPI
Unit
Watchdog
Timer
Analog
Comparator
Data
SRAM
EEPROM
I/O Module1
I/O Module 2
I/O Module n
I/O Lines
In order to maximize performance and parallelism, the AVR uses a Harvard architecture – with separate memories
and buses for program and data. Instructions in the program memory are executed with a single level pipelining.
While one instruction is being executed, the next instruction is pre-fetched from the program memory. This concept
enables instructions to be executed in every clock cycle. The program memory is In-System Reprogrammable
Flash memory.
The fast-access Register File contains 32 × 8-bit general purpose working registers with a single clock cycle
access time. This allows single-cycle Arithmetic Logic Unit (ALU) operation. In a typical ALU operation, two oper-
ATmega640/V-1280/V-1281/V-2560/V-2561/V [DATASHEET]
2549Q–AVR–02/2014
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ATMEGA1280.PDF ] | |
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