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ATMEGA640 Datasheet(PDF) 5 Page - ATMEL Corporation

Part No. ATMEGA640
Description  8-bit Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash
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Maker  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
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ATMEGA640 Datasheet(HTML) 5 Page - ATMEL Corporation

 
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5
ATmega640/1280/1281/2560/2561
2549KS–AVR–01/07
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.
Block Diagram
Figure 4. Block Diagram
CPU
GND
VCC
RESET
Power
Supervision
POR / BOD &
RESET
Watchdog
Oscillator
Watchdog
Timer
Oscillator
Circuits /
Clock
Generation
XTAL1
XTAL2
PC7..0
PORT C (8)
PA7..0
PORT A (8)
PORT D (8)
PD7..0
PORT B (8)
PB7..0
PORT E (8)
PE7..0
PORT F (8)
PF7..0
PORT J (8)
PJ7..0
PG5..0
PORT G (6)
PORT H (8)
PH7..0
PORT K (8)
PK7..0
PORT L (8)
PL7..0
XRAM
TWI
SPI
EEPROM
JTAG
8bit T/C 0
8bit T/C 2
16bit T/C 1
16bit T/C 3
SRAM
FLASH
16bit T/C 4
16bit T/C 5
USART 2
USART 1
USART 0
Internal
Bandgap reference
Analog
Comparator
A/D
Converter
USART 3
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.


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