Features
•
High Performance, Low Power AVR
®
8-Bit Microcontroller
•
Advanced RISC Architecture
– 135 Powerful Instructions – Most Single Clock Cycle Execution
– 32 x 8 General Purpose Working Registers
– Fully Static Operation
– Up to 16 MIPS Throughput at 16 MHz
– On-Chip 2-cycle Multiplier
High Endurance Non-volatile Memory Segments
– 64K/128K/256K Bytes of In-System Self-Programmable Flash
– 4K Bytes EEPROM
– 8K Bytes Internal SRAM
– Write/Erase Cycles:10,000 Flash/100,000 EEPROM
– Data retention: 20 years at 85°C/ 100 years at 25°C
– 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 64K Bytes Optional External Memory Space
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:
– -40
°
C to 85
°
C Industrial
Ultra-Low Power Consumption
– Active Mode: 1 MHz, 1.8V: 500 µA
– Power-down Mode: 0.1 µA at 1.8V
Speed Grade:
– ATmega640V/ATmega1280V/ATmega1281V:
0 - 4 MHz @ 1.8 - 5.5V, 0 - 8 MHz @ 2.7 - 5.5V
– ATmega2560V/ATmega2561V:
0 - 2 MHz @ 1.8 - 5.5V, 0 - 8 MHz @ 2.7 - 5.5V
– ATmega640/ATmega1280/ATmega1281:
0 - 8 MHz @ 2.7 - 5.5V, 0 - 16 MHz @ 4.5 - 5.5V
– ATmega2560/ATmega2561:
0 - 16 MHz @ 4.5 - 5.5V
•
•
•
8-bit
Microcontroller
with
64K/128K/256K
Bytes In-System
Programmable
Flash
ATmega640/V
ATmega1280/V
ATmega1281/V
ATmega2560/V
ATmega2561/V
Preliminary
•
•
•
•
•
ATmega640/1280/1281/2560/2561
3. 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.
3.1
Block Diagram
Block Diagram
PF7..0
VCC
Figure 3-1.
PK7..0
PJ7..0
PE7..0
RESET
Power
Supervision
POR / BOD &
RESET
PORT F (8)
PORT K (8)
PORT J (8)
PORT E (8)
GND
Watchdog
Timer
Watchdog
Oscillator
JTAG
A/D
Converter
Analog
Comparator
USART 0
XTAL1
Oscillator
Circuits /
Clock
Generation
EEPROM
Internal
Bandgap reference
16bit T/C 3
XTAL2
CPU
16bit T/C 5
USART 3
PA7..0
PORT A (8)
16bit T/C 4
USART 1
PG5..0
PORT G (6)
XRAM
FLASH
SRAM
16bit T/C 1
PC7..0
PORT C (8)
TWI
SPI
8bit T/C 0
8bit T/C 2
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.
PORT D (8)
PORT B (8)
PORT H (8)
PORT L (8)
PD7..0
PB7..0
PH7..0
PL7..0
5
2549L–AVR–08/07
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